1358210 t、發明說明： 【發明所屬之技術領域】 本發明有關於一種光收發模組及系統和光收發方法， 特別是關於一種可準確探測終端設備的光收發模組系統和 光收發方法。 【先前技術】 隨著光傳輸技術的發展，光纖傳輸在傳輪速率/傳輸距 離和抗干擾能力上的優勢，使光收發模組（ transceiver module)得到了越來越廣泛的應用。由於光傳 輸技術的優勢，目前越來越多的應用希望將光 麵現有的電子收發器，使得具有傳統介== 速外設it件互連標準（PCIE)介面規格或通用串列匯流排 版本3.0 (USB3.G)介面規格等，的電子收發器也可以通 過光收發模組與終端設備進行域通訊。錢有技術的光 收發模組直接連接現有的普通介面規格的電子收發器栌， 會令電子收發器進人失效模式(disable mGde)，因此本發明 提出-賴的紐發⑽統及綠發方法，以解㈣ 有技術存在的問題。 【發明内容】 #有鑒於此，本發明提供-種光收發模組，包括 早兀’其輸出-接收終端丢失信號；—發射驅動單元，豆 包括-正接收信號端和—負接收信號端；一差分 ： 抗，其包括-第-終端阻抗和—第二終端阻抗，第二 阻抗和第二終端阻抗均直接連接至—參考電位 = 終端阻抗卜第-信號開關，_於正接收信 : 終端阻抗之間，其根據純終㈣失錢㈣收^ 0608-A42407TWF1 4 端是否耦接至第一終端阻抗；以及一第二信號開關，耦接 於負接收信號端與第二終端阻抗之間，其根據接收終端丟 失信號控制負接收信號端是否耦接至第二終端阻抗。 本發明更提供一種光收發系統，包括：一電子收發 器，其包括一正發送信號端和一負發送信號端；以及一光 收發模組，其可耦接於電子收發器，其包括一接收單元， 其輸出一接收終端丟失信號；一發射驅動單元，其包括一 正接收信號端和一負接收信號端，正接收信號端和負接收 信號端分別耦接至電子收發器的正發送信號端和負發送信 號端；一差分終端阻抗，其包括一第一終端阻抗和一第二 終端阻抗，第一終端阻抗和第二終端阻抗均直接連接至一 參考電位以構成差分終端阻抗；一第一信號開關，耦接於 正接收信號端與第一終端阻抗之間，其根據接收終端丟失 信號控制正接收信號端是否耦接至第一終端阻抗；以及一 第二信號開關，耦接於負接收信號端與第二終端阻抗之 間，其根據接收終端吾失信號控制負接收信號端是否耦接 至第二終端阻抗。 本發明所述的光收發模組與系統，在光收發模組内部 實現藉由終端設備的連接狀況來控制光收發模組之正負接 收信號端之間動態地耦接差分終端阻抗，從而使得主控端 的電子收發器準確地得知光纜對面終端設備的連接狀況。 原本無法直接連接光收發模組的電子收發器，藉由本發明 的光收發模組與系統也可以與終端設備實現光纖傳輸，且 終端設備能夠實現熱插拔功能。本發明無需更改主控端的 電子收發器原來的介面設計。在本發明的光收發模組中， 由於該接收終端丟失信號為内部信號，因此在設計光收發 0608-A42407TWF1 5 1358210 才果組的介面時，可以不設計引腳引出接收終端丟失信號， 如此還可以減少光收發模組的引腳數量。 【實施方式】 為使本發明之上述目的、特徵和優點能更明顯易懂， 下文特舉一較佳實施例，並配合所附圖式，作詳細說明如 下。 第1圖是現有技術的電子收發系統1 〇〇的方塊圖。其 中’電子收發器120可以是具有快速外設元件互連標準 (PCIE)介面規格或通用串列匯流排版本3.0 (USB3.0) 介面規格等，支援熱插拔功能的高速電子收發器。當該電 子收發盗120作為傳輸系統的主控端（host)時，每隔— 疋日守間會輪詢（polling)是否有設備端（device )插入，當 探測到設備端150插入時，該電子收發器120會發起傳輪 一鏈結訓練序列（link training sequence)以建立與設備端 150的鏈結。當然，設備端150也會每隔一定時間輪詢主 控端是否存在，當探測到作為主控端的電子收發器12〇存 在時’也會發起傳輸一鏈結訓練序列以建立與電子收發器 120的鏈結。 電子收發器120與設備端150的連接方式如第1圖所 示’電子收發器120的正發送信號端TX+和負發送信號端 TX-耦接至設備端15〇的正接收信號端RX+和負接收信號 端RX-，實現由電子收發器120向設備端150發送資料， 資料可以是以一差動信號對的形式發送；電子收發器120 的正接收信號端RX+和負接收信號端RX-耦接至設備端 150的正發送信號端TX+和負發送信號端TX-，實現由設 0608-A42407TWF1 6 1358210 備端150向電子收發器120發送資料，資料也可以是以一 差動信號對的形式發送。電子收發器120透過輪詢其正發 送信號端TX+和負發送信號端TX-之間是否耦接差分终端 阻抗（differential terminator impedance)來判斷是否有設備 端插入。當設備端150如第1圖所示連接至電子收發器120 並準備好時，設備端150的正接收信號端RX+和負接收信 號端RX-之間就會存在差分終端阻抗112，電子收發器120 探測到其正發送信號端TX+和負發送信號端TX-之間出現 了差分終端阻抗，也就是探測到了終端阻抗112的存在， 則認為有設備端插入，該電子收發器120會發起鏈結訓練 序列（link training sequence)’以建立與設備端15〇的鍵 結。當然，當設備端150也會輪詢探測到其正發送信號端 τχ+和負發送信號端τχ-之間是否存在差分終端阻抗 以判斷是否連接到電子收發器120。 但現有技術中，某些類型的設備端150,例如是經由光 收發模組（optical transceiver module)連接的設備端I%， 在連接至電子收發器120時會發生問題。由於光收發模組 内部固化有差分終端阻抗，一旦將光收發模組按照第i圖 中設備端150連接至電子收發器120的方式連接至電子收 發器120時，電子收發器120就會探測到其正發送信號端 TX+和負發送號端TX-之間出現了差分終端阻抗，則立 即認為已經有設備端插入，因此會發起傳輸一鏈結训練序 列（link training sequence )。但此時光收發模組所連接光纜 的另一端很可能並沒有連接終端設備或者終端設備並沒有 準備好，因此該鏈結訓練序列就會建立失敗，主控端的帝 0608-A42407TWFI 7 1358210 子收發器120就會進入一失效模式（disable mode)。 因此現有技術中，普通介面規袼的電子收發器無法直 接通過光收發模組接連至設備端，從而建立光纖通訊。 第2圖解本發明光收發模組的一種實施方式，光收發 模組210包括：接收單元211 ’其輸出一接收終端去失传 號（receiver lost signal) RX—LOS ;發射驅動單元 212，其 包括一正接收信號端TD+和一負接收信號端TD•，以接收 主機端（host)發來的信號，信號可以是一差動信號對的 形式，終端控制單A213 ’料接在該正接收信號端取 與負接收信號端TD_之間，根據該接收終端丟失作號 RX_L0S來控制該正接收信號端TD+與負接收信號端^ 之間是否祕-差分終端阻抗’差分終端阻抗舉例而言曰 正接收信號端TD+經由-終端阻抗_接至—參考電位= 接收信號端TD·也經由—終端阻抗缺至該參考電位，^ 參考電位舉例而言可以是接地，該終端阻抗可能包括》電 容，電阻，電感等元件。該光收發模組加可經 連接至終端設備240。 見 該ΐ收發模組21G更包括-光檢測單元2丨6,其轉接至 該接收皁元211。在本發 ,, 乃"他貝施例中，該光檢測單开 216也可以是包括在該接收單元211中。檢 檢測該終端設備240發& ^ ^ 、 凡216 輸出至該接收單元21^==其#變為電信號， 接至光收發模組21Q並準二;H4()經由錢230連 千1胥野B^· ’該光檢箪元2 到終端設備240發出的光# # 、 褛收 ”傳斗將其轉變為電接收 傳玄接收早兀211，則接收單元扣輸出的該接收 0608-A42407TWF1 獨210BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical transceiver module and system, and an optical transceiver method, and more particularly to an optical transceiver module system and an optical transceiver method capable of accurately detecting a terminal device. [Prior Art] With the development of optical transmission technology, the advantages of optical fiber transmission in transmission rate/transmission distance and anti-interference ability have made optical transceiver modules more and more widely used. Due to the advantages of optical transmission technology, more and more applications are expected to be used in the existing electronic transceivers, which have the traditional PCI/Interconnect Standard (PCIE) interface specification or universal serial bus version. The electronic transceiver of 3.0 (USB3.G) interface specification can also communicate with the terminal device through the optical transceiver module. The money-transmitted optical transceiver module directly connects to the existing common interface specification electronic transceiver 栌, which will cause the electronic transceiver to enter a failure mode (disable mGde), so the present invention proposes a new ray (10) system and a green hair method To solve (4) problems with technology. SUMMARY OF THE INVENTION In view of the above, the present invention provides an optical transceiver module comprising: an output-receiving terminal lost signal; an emission driving unit, the bean includes a positive receiving signal terminal and a negative receiving signal terminal; a differential: anti-, including - the first-terminal impedance and - the second terminal impedance, the second impedance and the second terminal impedance are directly connected to - reference potential = terminal impedance - first signal switch, _ is receiving letter: terminal Between the impedances, according to the pure final (four) lost money (four) received ^ 0608-A42407TWF1 4 end is coupled to the first terminal impedance; and a second signal switch is coupled between the negative receiving signal end and the second terminal impedance, It controls whether the negative receiving signal end is coupled to the second terminal impedance according to the receiving terminal loss signal. The present invention further provides an optical transceiver system, including: an electronic transceiver including a positive transmitting signal terminal and a negative transmitting signal terminal; and an optical transceiver module coupled to the electronic transceiver, including a receiving The unit outputs a receiving terminal loss signal; a transmitting driving unit includes a positive receiving signal end and a negative receiving signal end, and the positive receiving signal end and the negative receiving signal end are respectively coupled to the positive transmitting signal end of the electronic transceiver And a negative transmission signal end; a differential termination impedance comprising a first termination impedance and a second termination impedance, the first termination impedance and the second termination impedance are both directly connected to a reference potential to form a differential termination impedance; The signal switch is coupled between the positive receiving signal end and the first terminal impedance, and controls whether the positive receiving signal end is coupled to the first terminal impedance according to the receiving terminal missing signal; and a second signal switch coupled to the negative receiving end Between the signal end and the second terminal impedance, it controls whether the negative receiving signal end is coupled to the second terminal impedance according to the receiving terminal and the loss signal. The optical transceiver module and system of the present invention realizes that the connection between the positive and negative receiving signals of the optical transceiver module is dynamically coupled to the differential terminal impedance by the connection state of the terminal device in the optical transceiver module, thereby making the main The electronic transceiver of the control terminal accurately knows the connection status of the terminal device opposite to the optical cable. The electronic transceiver that cannot be directly connected to the optical transceiver module can realize optical fiber transmission with the terminal device by the optical transceiver module and system of the present invention, and the terminal device can implement the hot plug function. The invention does not need to change the original interface design of the electronic transceiver of the main control terminal. In the optical transceiver module of the present invention, since the lost signal of the receiving terminal is an internal signal, when the interface of the optical transceiver 0608-A42407TWF1 5 1358210 is designed, the pin can be omitted from the receiving terminal to lose the signal. It can reduce the number of pins of the optical transceiver module. The above described objects, features and advantages of the present invention will become more apparent from the following description. Figure 1 is a block diagram of a prior art electronic transceiver system 1A. The 'electronic transceiver 120' can be a high-speed electronic transceiver with hot-swap capability, such as the Fast Peripheral Component Interconnect Standard (PCIE) interface specification or the Universal Serial Bus Version 3.0 (USB3.0) interface specification. When the electronic transponder 120 is used as the host of the transmission system, every other day of the polling will poll (polling) whether a device is inserted. When the device 150 is detected, the device is inserted. The electronic transceiver 120 initiates a link training sequence to establish a link with the device end 150. Certainly, the device end 150 also polls whether the main control terminal exists at a certain time. When detecting that the electronic transceiver 12 as the main control terminal exists, the transmission chain training sequence is also initiated to establish the electronic transceiver 120. Chain. The electronic transceiver 120 is connected to the device end 150 as shown in FIG. 1 . The positive transmitting signal terminal TX+ and the negative transmitting signal terminal TX- of the electronic transceiver 120 are coupled to the positive receiving signal terminal RX+ and negative of the device terminal 15A. Receiving the signal terminal RX-, the data is transmitted from the electronic transceiver 120 to the device end 150, and the data may be sent in the form of a differential signal pair; the positive receiving signal terminal RX+ of the electronic transceiver 120 and the negative receiving signal terminal RX-coupled Connected to the positive transmitting signal terminal TX+ and the negative transmitting signal terminal TX- of the device end 150, the data is sent to the electronic transceiver 120 by the standby terminal 150 of the 0608-A42407TWF1 6 1358210, and the data may also be in the form of a differential signal pair. send. The electronic transceiver 120 determines whether there is a device end insertion by polling whether a differential terminator impedance is coupled between the positive transmitting signal terminal TX+ and the negative transmitting signal terminal TX-. When the device end 150 is connected to the electronic transceiver 120 as shown in FIG. 1 and is ready, a differential termination impedance 112 exists between the positive receiving signal terminal RX+ and the negative receiving signal terminal RX- of the device terminal 150, and the electronic transceiver 120 detects that a differential termination impedance occurs between the positive transmitting signal terminal TX+ and the negative transmitting signal terminal TX-, that is, the presence of the terminal impedance 112 is detected, and it is considered that the device end is inserted, and the electronic transceiver 120 initiates the link. A link training sequence' is used to establish a bond with the device. Of course, when the device end 150 also polls to detect whether there is a differential termination impedance between the positive transmitting signal terminal τ χ + and the negative transmitting signal terminal τ χ - to determine whether to connect to the electronic transceiver 120. However, in the prior art, some types of device terminals 150, such as device terminals 1% connected via an optical transceiver module, may have problems when connected to the electronic transceiver 120. Since the optical transceiver module is internally solidified with differential termination impedance, the electronic transceiver 120 detects when the optical transceiver module is connected to the electronic transceiver 120 in such a manner that the device terminal 150 is connected to the electronic transceiver 120 in FIG. A differential termination impedance occurs between the positive transmitting terminal TX+ and the negative transmitting terminal TX-, and immediately the device is inserted, so a link training sequence is initiated. However, at this time, the other end of the optical fiber cable connected to the optical transceiver module may not be connected to the terminal device or the terminal device is not ready, so the link training sequence will fail to be established, and the main controller of the terminal 0608-A42407TWFI 7 1358210 sub-transceiver 120 will enter a disable mode. Therefore, in the prior art, the electronic transceiver of the common interface specification cannot be directly connected to the device end through the optical transceiver module, thereby establishing optical fiber communication. The second embodiment of the optical transceiver module of the present invention, the optical transceiver module 210 includes: a receiving unit 211 'outputs a receiving terminal receiver lost signal RX-LOS; a transmitting driving unit 212, which includes a The receiving signal terminal TD+ and the negative receiving signal terminal TD• are received to receive a signal sent by the host. The signal may be in the form of a differential signal pair, and the terminal control unit A213' is connected to the positive receiving signal end. Between the negative receiving signal terminal TD_ and the receiving terminal, the missing signal RX_L0S is used to control whether the positive receiving signal terminal TD+ and the negative receiving signal terminal ^ are secret-differential terminal impedance 'differential terminal impedance as an example The receiving signal terminal TD+ is connected to the terminal via the terminal impedance _ to the reference potential = the receiving signal terminal TD is also absent to the reference potential via the terminal impedance, and the reference potential may be grounded, for example, and the terminal impedance may include "capacitance, resistance" , inductance and other components. The optical transceiver module can be connected to the terminal device 240. The transceiver module 21G further includes a light detecting unit 2丨6 that is transferred to the receiving soap unit 211. In the present invention, the light detection single opening 216 may also be included in the receiving unit 211. Detecting that the terminal device 240 sends & ^ ^, where 216 is output to the receiving unit 21^==# becomes an electrical signal, and is connected to the optical transceiver module 21Q and is second; H4() is connected by money 230野B^· 'The light inspection unit 2 to the light emitted by the terminal device 240 ##, 收收" hopper to convert it into the electric receiving transmission 兀 兀 兀 兀 211, then the receiving unit buckle output the reception 0608-A42407TWF1 Unique 210
備240並未耦接至該光收發模組21〇，或該終端設備24〇 未準備好時，該光檢測單元216無法正確接收到終端設備 240發出的光接收信號，此時接收單元2ιι輸出的接收終 端丟失仏號RX一LOS為有效（asserted)。缺而目前電子收 發器’例如具有快速外設元件互連標準（ραΕ)介面規格 或通用串顺流排版本3.〇 (USB3.G)介面規格等的高速 电子收發$ ’並不具備接收該接收終端丢失信號rx—咖 的輸入端。因此光收發模組21G無法告知其所輕接的電子 收發器Μ祕端設備24〇連❹m光收發模組 210並準 借好（例如終端設備24Q是否上電並準備好收發資料）。When the device 240 is not coupled to the optical transceiver module 21〇, or the terminal device 24 is not ready, the light detecting unit 216 cannot correctly receive the light receiving signal sent by the terminal device 240, and the receiving unit 2 ι outputs The receiving terminal loses the nickname RX-LOS as asserted. Lack of current electronic transceivers, such as high-speed electronic transceivers with fast peripheral component interconnect standard (ραΕ) interface specifications or universal serial-sequential version 3. 〇 (USB3.G) interface specifications, etc. The receiving terminal loses the input of the signal rx-caffe. Therefore, the optical transceiver module 21G cannot inform the electronic transceiver that the lightly connected transceiver terminal 24 is connected to the m optical transceiver module 210 and borrows it (for example, whether the terminal device 24Q is powered on and ready to send and receive data).
終端丟失信號置RX_LOS為無效（de_asserted)。當終端設 本發明的光收發模組21〇中，終端控制單元213可接 ，該接收終端钱錢RX—LQS，並減該接祕端吾失 仏號RX_LOS控制該正接收信號端TD+與負接收信號端 TD-之間是聽接—差分終端阻抗，如此動態地控制使得光 收發模組210之正接收信號端TD+與負接收信號端瓜之 間的差分終端阻抗可以動態地耦接或斷開，其所耦接的電 子收發益通過輪詢是否存在差分終端阻抗就可以準確地得 知終端設備240的連接情況，並不會在光收發模組尚未連 接終端設備240或接終端設備24〇尚未準備好的情形下， 發起傳輸鏈結此練序列（Hnk trajning seqUence)，而導致電 子收發态進入失效模式（disabie mode)。在本發明其他實 施例中’該接收終端丟失信號1〇(_]1(：^輸入終端控制單元 213之前另有一處理電路（未繪示）對該接收終端丟失信 號RX—LOS作前端處理，以產生一指示信號輸入終端控制 0608-A42407TWF1 9 1358210 單元213以指示是否有終端設備24〇連接到該光收發模組 210並準備好。 第3圖是本發明一實施例中終端控制單元313的方塊 圖。其中該終端控制單元313包括一終端阻抗單元305、 一第一終端阻抗開關301以及一第二終端阻抗開關3〇2， 其中終端阻抗單元305包括第一終端阻抗303和一第二終 端阻抗304，第一終端阻抗3〇3和第二終端阻抗3〇4均耦 接至一參考電位以構成一個差分終端阻抗，該參考電位舉 例而吕可以是接地；第一終端阻抗開關3〇 1麵接至第一終 鲁 端阻抗303，當接收終端丟失信號RX_L〇s為有效時，第 一終端阻抗開關301打開，正接收信號端TD+與該參考電 位之間不會麵接第一終端阻抗303;當接收終端丟失信號 RX—LOS為無效時，第一終端阻抗開關3〇1閉合，正接收 信號端TD+與該參考電位之間耦接第一終端阻抗3〇3 ;第 二終端阻抗開關302耦接至第二終端阻抗3〇4，當接收終 端丟失信號RX一LOS為有效時，第二終端阻抗開關3〇2打 開，負接收信號端TD·與該參考電位之間不會耦接第二終 馨 端阻抗304 ;當接收終端丟失信號RX_L〇s為無效時，第 二終端阻抗開關302閉合，負接收信號端TD_與該參考電 位之間柄接苐二終端阻抗304。在本發明一實施例中，該 第一和第二終端阻抗開關301和302可以由功率場效應電 晶體MOSFET來實現，可根據接收終端丟失信號RX_L〇s 有效電位的高低來選擇不同類型的功率場效應電晶體的 MOSFET和驅動方式。此為本領域技術人員所習知的技 術，在此不再贅述。The terminal loses signal and sets RX_LOS to be invalid (de_asserted). When the terminal is provided with the optical transceiver module 21 of the present invention, the terminal control unit 213 can be connected, the receiving terminal money RX-LQS, and the terminal is reduced by the nickname RX_LOS to control the positive receiving signal terminal TD+ and negative The receiving signal terminal TD- is a snoring-differential terminal impedance, so that the dynamic terminal control can dynamically couple or disconnect the differential terminal impedance between the positive receiving signal terminal TD+ and the negative receiving signal terminal end of the optical transceiver module 210. The electronic transceiver coupled to the transceiver can accurately know the connection status of the terminal device 240 by polling whether there is a differential terminal impedance, and does not connect the terminal device 240 or the terminal device 24 to the optical transceiver module. In the unprepared situation, the transmission chain is initiated with this training sequence (Hnk trajning seqUence), which causes the electronic transceiver state to enter the disabie mode. In other embodiments of the present invention, the receiving terminal loses the signal 1〇(_]1 (:^ the input terminal control unit 213 has another processing circuit (not shown) for the front end processing of the receiving terminal lost signal RX_LOS, To generate an indication signal input terminal control 0608-A42407TWF1 9 1358210 unit 213 to indicate whether there is a terminal device 24〇 connected to the optical transceiver module 210 and ready. FIG. 3 is a terminal control unit 313 according to an embodiment of the present invention. The terminal control unit 313 includes a terminal impedance unit 305, a first terminal impedance switch 301, and a second terminal impedance switch 3〇2, wherein the terminal impedance unit 305 includes a first terminal impedance 303 and a second terminal. The impedance 304, the first terminal impedance 3〇3 and the second terminal impedance 3〇4 are all coupled to a reference potential to form a differential termination impedance, the reference potential may be grounded by way of example; the first terminal impedance switch 3〇1 Connected to the first terminal luer impedance 303, when the receiving terminal loss signal RX_L〇s is active, the first terminal impedance switch 301 is turned on, the receiving signal terminal TD+ and the reference The first terminal impedance 303 is not connected between the potentials; when the receiving terminal loss signal RX_LOS is invalid, the first terminal impedance switch 3〇1 is closed, and the positive receiving signal terminal TD+ is coupled with the reference potential first. The terminal impedance is 3〇3; the second terminal impedance switch 302 is coupled to the second terminal impedance 3〇4, and when the receiving terminal loses the signal RX-LOS is active, the second terminal impedance switch 3〇2 is opened, and the negative receiving signal terminal TD · The second terminal impedance 304 is not coupled to the reference potential; when the receiving terminal loss signal RX_L〇s is invalid, the second terminal impedance switch 302 is closed, and the negative receiving signal terminal TD_ and the reference potential are The first handle is connected to the second terminal impedance 304. In an embodiment of the invention, the first and second terminal impedance switches 301 and 302 can be implemented by a power field effect transistor MOSFET, and the effective potential of the missing signal RX_L〇s can be obtained according to the receiving terminal. The MOSFET and the driving mode of different types of power field effect transistors are selected. This is a technique known to those skilled in the art and will not be described herein.
0608-A42407TWF1 S 1358210 第4圖是本發明另一實施例中終端控制單元413的方 塊圖。終端控制單元413耦接在該正接收信號端TD+與負 接收信號端TD-之間，根據該接收終端丟失信號RX_L〇S 控制該正接收信號端TD+與負接收信號端TD-之間是否耦 接一差分終端阻抗。本實施例中，差分終端阻抗4〇5固化 (fixed)在光收發模組内部，可以是由兩個終端阻抗403 和404構成，終端阻抗4〇3和4〇4均耦接至一參考電位， 該參考電位舉例而言可以是接地。終端控制單元413包括 第一信號開關401和第二信號開關402，第一信號開關401 和第二信號開關402可以作為獨立的電路器件，直接控制 正接收信號端TD+與負接收信號端TD-之間是否耦接差分 終端阻抗405 :當接收終端丟失信號rx_l〇S為有效時， 第一k號開關401打開’使得正接收信號端TD+不耦接至 差分終端阻抗405，第二信號開關402也打開，使得負接 收k號端TD-也不_接至差分終端阻抗4〇5;當接收終端丟 失信號RX 一 LOS為無效時，第一信號開關4〇1閉合，使得 正接收信號端TD+輕接至差分終端阻抗405，第二信號開 關402也閉合，使得負接收信號端TD_也耦接至差分終端 阻抗405。當正接收信號端TD+與負接收信號端TD_之間 輪接差分終端阻抗405時’第2圖之光收發模組21〇就可 以被其所麵接的電子收發器探測到。在本實施例中，第一 號開關401和第二信號開關402作為獨立的電路器件可 以用信號開關（signal switch )實現，例如以高速的主動開 關（active switch )或高速的被動開關（passive switch )實 現0 0608-A42407TWF3 1358210 第5圖是本發明光收發系統的一種實施方式。光收發 系統500包括一電子收發器520，其包括一正發送信號端 TX+和一負發送信號端TX-; —光收發模組510，其耦接於 電子收發器520。該光收發模組510更包括一接收單元 511，其輸出一接收終端丟失信號RX_LOS ; —發射驅動單 元512，其包括一正接收信號端TD+和一負接收信號端 TD-，該正接收信號端TD+和該負接收信號端TD-分別耦接 至該電子收發器520的該正發送信號端TX+和該負發送信 號端TX- ’實現由電子收發器520向光收發模組510發送 資料，資料可以是以一差動信號對的形式發送；一終端控 制單元513 ’其耦接在該正接收信號端TD+與負接收信號 端TD-之間，根據該接收終端丟失信號rX_l〇s控制該正 接收信號端TD+與該負接收信號端TD-之間是否耦接一差 分終端阻抗。為了完成與電子收發器520的雙邊通訊，光 收發杈組510之接收單元511更包括一正發送信號端RD+ 和一負發送信號端RD-，其分別耦接至該電子收發器52〇 之一正接收信號端RX+和一負接收信號端RX_，實現由光 收發模組510向電子收發器52〇發送資料，資料也可以是 以一差動信號對的形式發送。該光收發模組51〇可經由光 镜530連接至終端設備540。其中該電子收發器520可以 是具有快速外設元件互連標準（PCIE)介面規格或通用串 列匯流排版本3·〇 (USB3.0)介面規格等，支援熱插拔功 能的向速電子收發器。當然，本發明的電子收發器520可 以是具有能發送差動信號對的正負發送信號端TX+\TX-， 以及能接受差動信號對的正負接收信號端RX+VRX_的主機 0608-A42407TWF1 1358210 端（host )设備，並不一定限於θ百士 亚不 於疋具有快速外設元件互連 標準(PCIE)介务規格或通用串：卜-兀件互逑 入品招故μ古“ 中JL/爪排版本3.0(USB3.0) 介面規格的间迷電子收發器。 當該光收發模組510如第5圖所 ^ ι；Γ^σο <0Λ 口所不的方式連接至該電 子收^而光收發模組训尚未連接任何終端設備 540 1接收單元511輸出的接收終端吾失信號以⑽ ^有效，則終端控制單元513根據該有效的接收終端丢失 虎RX_L0S，控制該正接收信號端TD+與該 端TD-之間不轉接差分終端阻抗。電子收發器52〇通過輪ϋ 詢其正發送信號端ΤΧ+與負發送信號端τχ_之間是否存在 差分終端阻抗來判斷是否有終端設備54〇插入，此時電子 收發斋520探測不到差分終端阻抗存在，則認為無終端設 備插入，則該電子收發器520並不會發起鏈結訓練序列。 當該光收發模組510連接至該電子收發器520且光收發模 組510也連接至終端設備540，但該終端設備540尚未準 備好時’接收終端丟失信號RX—L0S仍然有效，則光收發 权組510之正接收信號端TD+與負接收信號端TD-之間仍 然不耦接差分終端阻抗，因此該電子收發器520也不會發 起鏈結§)|丨練序列。而當該光收發模組510連接至該電子故 發器520且光收發模組510也連接至終端設備540並準借 好時，接收終端丟失信號RX 一 L0S被置為無效，則光收發 模組510之正接收信號端TD+與負接收信號端TD-之間輕 接差分終端阻抗，該電子收發器520探測到其正發送信號 端ΤΧ+與負發送信號端τχ-之間存在差分終端阻抗，則發 起鏈結訓練序列，以建立與該終端設備540的鏈結。 0608-A42407TWF1 13 1358210 第6圖解本發明之光收發系統中電子收發器輪々旬差八 終端阻抗的一實施例。如前所述，光收發模組之該正接收 信號端TD+和該負接收信號端TD-分別耦接至電子收發器 的該正發送信號端TX+和該負發送信號端TX-，電子收發 器是通過輪詢其正發送信號端TX+與負發送信號端τχ-之 間是否耦接差分終端阻抗來探測是否有終端設備插入。電 子收發器每隔一定時間進行一次輪詢以決定是否發起鏈結 訓練序列。如第5圖所示，在輪詢是否耦接差分終端阻抗 時’電子收發器將其正發送信號端TX+與地之間的共模電 壓（common mode voltage)和負發送信號端TX-與地之間 的共模電壓充電至一特定值而後放電，透過放電後此共模 電壓下降至一閾值的放電時間來判斷是否耦接差分終端阻 抗。當電子收發為並未連接任何終端設備時，電子收發器 之正發送信號端τχ+與地之間原本存在充電電阻Rdl和寄 生電容Cpl，因此放電路徑是經由Rdl和Cpl組成，負發 送信號端TX-與地之間原本存在充電電阻Rd2和寄生電容 CP2’因此放電路徑是經由Rd2和Cp2組成，此時放電時 間為tl ;當終端設備連接並準備好時，本發明光收發模組 -貫施例之終知阻抗開關6G1和6Q2閉合，則差分終端阻0608-A42407TWF1 S 1358210 Fig. 4 is a block diagram of the terminal control unit 413 in another embodiment of the present invention. The terminal control unit 413 is coupled between the positive receiving signal terminal TD+ and the negative receiving signal terminal TD-, and controls whether the positive receiving signal terminal TD+ and the negative receiving signal terminal TD- are coupled according to the receiving terminal lost signal RX_L〇S. Connect a differential termination impedance. In this embodiment, the differential termination impedance 4〇5 is fixed in the optical transceiver module, and may be composed of two terminal impedances 403 and 404, and the terminal impedances 4〇3 and 4〇4 are all coupled to a reference potential. The reference potential can be, for example, grounded. The terminal control unit 413 includes a first signal switch 401 and a second signal switch 402. The first signal switch 401 and the second signal switch 402 can be used as independent circuit devices to directly control the positive receiving signal terminal TD+ and the negative receiving signal terminal TD- Whether the differential termination impedance 405 is coupled: when the receiving terminal loss signal rx_l〇S is active, the first k-th switch 401 is turned on 'so that the positive receiving signal terminal TD+ is not coupled to the differential terminal impedance 405, and the second signal switch 402 is also Open, so that the negative receiving k terminal TD- is not connected to the differential terminal impedance 4〇5; when the receiving terminal lost signal RX-LOS is invalid, the first signal switch 4〇1 is closed, so that the receiving signal terminal TD+ is light Connected to the differential termination impedance 405, the second signal switch 402 is also closed such that the negative receive signal terminal TD_ is also coupled to the differential termination impedance 405. When the differential terminal impedance 405 is rotated between the receiving signal terminal TD+ and the negative receiving signal terminal TD_, the optical transceiver module 21 of Fig. 2 can be detected by the electronic transceiver to which it is connected. In this embodiment, the first switch 401 and the second signal switch 402 can be implemented as separate circuit devices by using a signal switch, such as a high speed active switch or a high speed passive switch. Implementation 0 0608-A42407TWF3 1358210 FIG. 5 is an embodiment of the optical transceiver system of the present invention. The optical transceiver system 500 includes an electronic transceiver 520 including a positive transmitting signal terminal TX+ and a negative transmitting signal terminal TX-; and an optical transceiver module 510 coupled to the electronic transceiver 520. The optical transceiver module 510 further includes a receiving unit 511 that outputs a receiving terminal loss signal RX_LOS. The transmitting driving unit 512 includes a positive receiving signal terminal TD+ and a negative receiving signal terminal TD-. The positive receiving signal terminal The TD+ and the negative receiving signal terminal TD- are respectively coupled to the positive transmitting signal terminal TX+ and the negative transmitting signal terminal TX-′ of the electronic transceiver 520, so that the electronic transceiver 520 transmits the data to the optical transceiver module 510. It may be sent in the form of a differential signal pair; a terminal control unit 513 ' is coupled between the positive receiving signal terminal TD+ and the negative receiving signal terminal TD-, and controls the positive according to the receiving terminal loss signal rX_l〇s Whether a differential termination impedance is coupled between the receiving signal terminal TD+ and the negative receiving signal terminal TD-. In order to complete the bilateral communication with the electronic transceiver 520, the receiving unit 511 of the optical transceiver group 510 further includes a positive transmitting signal terminal RD+ and a negative transmitting signal terminal RD-, which are respectively coupled to one of the electronic transceivers 52 The receiving signal terminal RX+ and the negative receiving signal terminal RX_ enable the optical transceiver module 510 to transmit data to the electronic transceiver 52, and the data may also be sent in the form of a differential signal pair. The optical transceiver module 51A can be connected to the terminal device 540 via the optical mirror 530. The electronic transceiver 520 may be a fast peripheral component interconnect standard (PCIE) interface specification or a universal serial bus version 3. 〇 (USB3.0) interface specification, and the hot-swappable electronic transmission and reception function is supported. Device. Of course, the electronic transceiver 520 of the present invention may be a host 0608-A42407TWF1 1358210 having a positive and negative transmitting signal terminal TX+\TX- capable of transmitting a differential signal pair, and a positive and negative receiving signal terminal RX+VRX_ capable of accepting a differential signal pair. The host device is not necessarily limited to θ 百家亚不疋 疋 has a fast peripheral component interconnection standard (PCIE) device specification or a universal string: 卜 - 逑 逑 逑 招 招 招 μ μ JL/Paw Crowbar version 3.0 (USB3.0) interface specification for the electronic transceiver. When the optical transceiver module 510 is connected to the electronic device as shown in Fig. 5, Γ^σο <0Λ The receiving and receiving module output of the receiving unit 511 is not (10) ^ valid, and the terminal control unit 513 controls the receiving signal according to the effective receiving terminal losing the tiger RX_L0S. The differential terminal impedance is not switched between the terminal TD+ and the terminal TD-. The electronic transceiver 52 determines whether there is a differential termination impedance between the positive transmitting signal terminal ΤΧ+ and the negative transmitting signal terminal τχ_ by polling whether there is a differential terminal impedance The terminal device 54 is inserted, at this time If the sub-receiving 520 does not detect the presence of the differential termination impedance, then the electronic transceiver 520 does not initiate the link training sequence when no terminal device is inserted. When the optical transceiver module 510 is connected to the electronic transceiver 520 and is optical The transceiver module 510 is also connected to the terminal device 540. However, when the terminal device 540 is not ready, the receiving terminal loss signal RX_L0S is still valid, and the positive receiving signal terminal TD+ and the negative receiving signal terminal TD of the optical transceiver group 510 are The differential termination impedance is still not coupled, so the electronic transceiver 520 does not initiate the link §)|skill sequence. When the optical transceiver module 510 is connected to the electronic transceiver 520 and the optical transceiver module When the 510 is also connected to the terminal device 540 and borrowed, the receiving terminal loss signal RX_L0S is set to be invalid, and the optical transceiver module 510 is connected to the differential terminal between the positive receiving signal terminal TD+ and the negative receiving signal terminal TD-. Impedance, the electronic transceiver 520 detects that there is a differential termination impedance between its positive transmitting signal terminal ΤΧ+ and the negative transmitting signal terminal τχ-, and then initiates a link training sequence to establish a link with the terminal device 540. 608-A42407TWF1 13 1358210 The sixth embodiment illustrates an embodiment of the electronic transceiver rim of the optical transceiver system of the present invention having eight terminal impedances. As described above, the positive receiving signal terminal TD+ of the optical transceiver module and the negative receiving The signal terminal TD- is respectively coupled to the positive transmitting signal terminal TX+ and the negative transmitting signal terminal TX- of the electronic transceiver, and the electronic transceiver is polled whether between the positive transmitting signal terminal TX+ and the negative transmitting signal terminal τχ- The differential termination impedance is coupled to detect if a terminal device is inserted. The electronic transceiver performs a poll at regular intervals to determine whether to initiate a chain training sequence. As shown in FIG. 5, when the polling is coupled to the differential termination impedance, the 'electronic transceiver transmits the common mode voltage and the negative transmission signal terminal TX- between the positive transmitting signal terminal TX+ and the ground. The common mode voltage is charged to a specific value and then discharged. After the discharge, the common mode voltage drops to a threshold discharge time to determine whether the differential termination impedance is coupled. When the electronic transceiver is not connected to any terminal device, there is originally a charging resistor Rd1 and a parasitic capacitor Cpl between the positive transmitting signal terminal τχ+ and the ground of the electronic transceiver, so the discharging path is composed of Rdl and Cpl, and the negative transmitting signal terminal There is originally a charging resistor Rd2 and a parasitic capacitor CP2' between TX- and ground. Therefore, the discharging path is composed of Rd2 and Cp2, and the discharging time is tl; when the terminal device is connected and ready, the optical transceiver module of the present invention The termination of the example is that the impedance switches 6G1 and 6Q2 are closed, then the differential termination resistor
以及與Cp 1並聯的和 此時的放電路徑是經由Rdl和Cpl、 aci和Rtl構成，另一條放電路徑是經 0608-A42407TWF1 由Rd2和Cp2、以及與Cp2並聯的CAC2和Rt2構成，由於 此時電路的RC常數更改，放電時間會變為t2。電子收發 器根據放電時間的變化就可以得知其正發送信號端TX+與 負發送信號端TX-之間是否耦接差分終端阻抗，從而探測 是否有終端設備插入。 本發明更揭露一種光收發方法，應用如第5圖所示的 光收發系統500，該方法包括：根據該終端設備540的狀 態輸出一接收終端丟失信號RXJLOS，再根據該接收終端 丟失信號RX_LOS控制該光收發模組510之正接收信號端 TD+與負接收信號端TD-之間是否耦接一差分終端阻抗。 當該終端設備540耦接至該光收發模組510並準備好時， 該接收終端丟失信號RX_LOS無效；當該終端設備540未 耦接至該光收發模組510,或該終端設備540未準備好時， 該接收終端丟失信號RX_LOS有效。當接收終端丟失信號 RX_LOS無效時，正接收信號端TD+和負接收信號端TD-之間耦接該差分終端阻抗。 本發明所述的光收發模組與系統及光收發方法，在光 收發模組的内部實現藉由終端設備的連接狀況來控制光收 發模組之正負接收信號端之間動態地耦接差分終端阻抗， 從而使得主控端的電子收發器準確地得知光纜對面終端設 備的連接狀況。原本無法直接連接光收發模組的電子收發 器，藉由本發明的光收發模組與系統也可以與終端設備實 現光纖傳輸，且終端設備能夠實現熱插拔功能。本發明無 需更改主控端的電子收發器原來的介面設計。在本發明的 光收發模組中，由於該接收終端丟失信號為内部信號，因 0608-A42407TWFJ 15 1358210 此在設計光收發模組的介面時，可以不設計引腳（ph)引 出接收終端丟失信號，如此還可以減少光收發模組的引腳 數量（pin count)。 本發明雖以較佳實施例揭露如上，然其並非用以限定 本發明的範圍，任何所屬技術領域中具有通常知識者，在 不脫離本發明之精神和範圍内，當可做些許的更動與潤 飾，因此本發明之保護範圍當視後附之申請專利範圍所界 定者為準。 【圖式簡單說明】 第1圖是現有技術的電子收發系統的方塊圖； 第2圖是本發明一實施例的光收發模組的方塊圖； 第3圖是本發明一實施例的終端控制單元的方塊圖； 第4圖是本發明另一實施例的終端控制單元的方塊圖； 第5圖是本發明一實施例的光收發系統的方塊圖； 第6圖是本發明之光收發系統中電子收發器輪詢差分 終端阻抗的一實施例。 【主要元件符號說明】 230、530〜光緵； 100〜電子收發系統； 112、113、405〜差分終端阻抗； 120、520〜電子收發器； 150〜設備端； 210、 510〜光收發模組； 211、 511〜接收單元； 212、 512〜發射驅動單元； 213、 313、413、513〜終端控制單元； 0608-A42407TWF1 16 1358210 216〜光檢測單元； 240、540〜终端設備； . 305、605〜终端阻抗單元； 301、302、401、402、601、602〜终端阻抗開關； 303、304、403、404〜終端組抗； ' 500〜光收發系統； ‘ RX_LOS〜終端丟失信號； RD+〜光收發模組之正發送信號端； φ RD-〜光收發模組之負發送信號端； RX+〜正接收信號端； RX-〜負接收信號端； TD+〜光收發模組之正接收信號端； TD-〜光收發模組之負接收信號端； TX+〜正發送信號端； - TX-〜負發送信號端。 • C： 0608-A42407丁 WF1 17And the parallel connection with Cp 1 and the discharge path at this time is formed by Rdl and Cpl, aci and Rtl, and the other discharge path is composed of 0608-A42407TWF1 by Rd2 and Cp2, and CAC2 and Rt2 connected in parallel with Cp2, since The RC constant of the circuit changes and the discharge time becomes t2. The electronic transceiver can know whether the differential terminal impedance is coupled between the positive transmitting terminal TX+ and the negative transmitting terminal TX- according to the change of the discharging time, thereby detecting whether or not the terminal device is inserted. The invention further discloses an optical transceiver method, which is applied to the optical transceiver system 500 as shown in FIG. 5. The method comprises: outputting a receiving terminal loss signal RXJLOS according to the state of the terminal device 540, and then controlling according to the receiving terminal loss signal RX_LOS Whether a differential termination impedance is coupled between the positive receiving signal terminal TD+ and the negative receiving signal terminal TD- of the optical transceiver module 510. When the terminal device 540 is coupled to the optical transceiver module 510 and is ready, the receiving terminal loss signal RX_LOS is invalid; when the terminal device 540 is not coupled to the optical transceiver module 510, or the terminal device 540 is not prepared When it is good, the receiving terminal lost signal RX_LOS is valid. When the receiving terminal loss signal RX_LOS is invalid, the differential terminal impedance is coupled between the positive receiving signal terminal TD+ and the negative receiving signal terminal TD-. The optical transceiver module and system and the optical transceiver method of the present invention enable the optical transceiver module to dynamically control the differential terminal between the positive and negative receiving signals of the optical transceiver module by the connection status of the terminal device. The impedance, so that the electronic transceiver of the master terminal accurately knows the connection status of the terminal device opposite to the cable. The electronic transceiver that can not directly connect to the optical transceiver module can realize optical fiber transmission with the terminal device by the optical transceiver module and system of the present invention, and the terminal device can implement the hot plug function. The invention does not need to change the original interface design of the electronic transceiver of the main control terminal. In the optical transceiver module of the present invention, since the receiving terminal loses the signal as an internal signal, because the 0608-A42407TWFJ 15 1358210 is designed to design the optical transceiver module interface, the receiving terminal can be lost without designing the pin (ph). This also reduces the pin count of the optical transceiver module. The present invention has been disclosed in the above preferred embodiments, and is not intended to limit the scope of the present invention. Any one of ordinary skill in the art can make a few changes without departing from the spirit and scope of the invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a prior art electronic transceiver system; FIG. 2 is a block diagram of an optical transceiver module according to an embodiment of the present invention; and FIG. 3 is a terminal control according to an embodiment of the present invention. Figure 4 is a block diagram of a terminal control unit according to another embodiment of the present invention; Figure 5 is a block diagram of an optical transceiver system according to an embodiment of the present invention; and Figure 6 is an optical transceiver system of the present invention; An embodiment in which the medium electronic transceiver polls the differential termination impedance. [Description of main components] 230, 530~optical; 100~ electronic transceiver system; 112, 113, 405~ differential termination impedance; 120, 520~ electronic transceiver; 150~ device end; 210, 510~ optical transceiver module 211, 511~ receiving unit; 212, 512~ transmitting drive unit; 213, 313, 413, 513~ terminal control unit; 0608-A42407TWF1 16 1358210 216~ light detecting unit; 240, 540~ terminal device; . ~ terminal impedance unit; 301, 302, 401, 402, 601, 602 ~ terminal impedance switch; 303, 304, 403, 404 ~ terminal group resistance; '500~ optical transceiver system; 'RX_LOS~ terminal lost signal; RD+~ light The positive transmitting signal end of the transceiver module; the negative transmitting signal end of the φ RD-~ optical transceiver module; the RX+~ positive receiving signal end; the RX-~ negative receiving signal end; the positive receiving signal end of the TD+~ optical transceiver module; TD-~ optical transceiver module negative receiving signal terminal; TX+~ positive transmitting signal terminal; - TX-~ negative transmitting signal terminal. • C: 0608-A42407 Ding WF1 17