SU468303A1 - Reader - Google Patents
ReaderInfo
- Publication number
- SU468303A1 SU468303A1 SU1916210A SU1916210A SU468303A1 SU 468303 A1 SU468303 A1 SU 468303A1 SU 1916210 A SU1916210 A SU 1916210A SU 1916210 A SU1916210 A SU 1916210A SU 468303 A1 SU468303 A1 SU 468303A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- reader
- transistors
- photodiode
- transistor
- power source
- Prior art date
Links
- 230000004907 flux Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
Landscapes
- Amplifiers (AREA)
Description
13ый при правильно подобранных транзисторах компенсируетс током коллекторного перехода -транзисторов. Тогда тран;зисторы закрыты и на выходе устройства поддерживаетс напр жение, равное напр жению источника питани .13th with properly selected transistors is compensated by the current of the collector junction -transistors. Then the transistors are closed and the output of the device is maintained at a voltage equal to the voltage of the power source.
При наличии освещенности на выходе фотодиода через него протекает фототок, втекающий в базу транзистора 3 и вытекающий из базы транзистора 2, Ток фотодиода усиливаетс обоими т ра1 зисторами . Токи транзисторов 2 и 3, протека по нагрузочному резистору, складываютс и создают на нем падение напр жени , пропорциональное световому потоку.In the presence of illumination at the photodiode output, a photocurrent flows through it, which flows into the base of transistor 3 and flows out of the base of transistor 2. The current of the photodiode is amplified by both T-resistors. The currents of the transistors 2 and 3, which flow through the load resistor, add up and create a voltage drop across it that is proportional to the luminous flux.
Ц р д м е т изобретени C d d e m invention
G читывающее устройство, содержащее фотодиод, два транзистора разных типов проводимости, резистор и источник питани , отличающеес тем, что, с целью повьпЛени помехозащищенности устройства, анод фотодиода подключен к базе tl -р-ух-транзистора, эмиттер которого соединен с одним полюсом источника питани и коллектором р-ух-р-транзистора эмиттер р-П.-р- йнзистор& подключен к коллектору tl-p-n-транзистора и через резистор к другому полюсу источника питани , а база р-ti-p-транзистора подключека к катоду фотодиода.G reader, containing a photodiode, two transistors of different types of conductivity, a resistor and a power source, characterized in that, in order to detect the interference immunity of the device, the photodiode anode is connected to a tl-p-uh-transistor base, the emitter of which is connected to one pole of the power source and a p-uh-p transistor emitter p-p-p-jsistor & connected to the tl-pnn collector and through a resistor to the other pole of the power source, and the base of the pn-pn transistor connected to the cathode of the photodiode.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1916210A SU468303A1 (en) | 1973-05-14 | 1973-05-14 | Reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1916210A SU468303A1 (en) | 1973-05-14 | 1973-05-14 | Reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU468303A1 true SU468303A1 (en) | 1975-04-25 |
Family
ID=20552013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1916210A SU468303A1 (en) | 1973-05-14 | 1973-05-14 | Reader |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU468303A1 (en) |
-
1973
- 1973-05-14 SU SU1916210A patent/SU468303A1/en active
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