CN112367064B - Ultrasonic high-voltage pulse synchronous triggering output circuit - Google Patents
Ultrasonic high-voltage pulse synchronous triggering output circuit Download PDFInfo
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- CN112367064B CN112367064B CN202011265484.4A CN202011265484A CN112367064B CN 112367064 B CN112367064 B CN 112367064B CN 202011265484 A CN202011265484 A CN 202011265484A CN 112367064 B CN112367064 B CN 112367064B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/023—Generators characterised by the type of circuit or by the means used for producing pulses by the use of differential amplifiers or comparators, with internal or external positive feedback
- H03K3/0232—Monostable circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/01—Details
- H03K3/017—Adjustment of width or dutycycle of pulses
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/027—Generators characterised by the type of circuit or by the means used for producing pulses by the use of logic circuits, with internal or external positive feedback
- H03K3/033—Monostable circuits
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Abstract
The invention discloses an ultrasonic high-voltage pulse synchronous trigger output circuit, which comprises the following components: the high-voltage pulse is converted into a low-voltage pulse signal; and a clamping circuit: for clamping an input low voltage pulse signal to a low voltage power rail; an amplifying circuit: for converting the low voltage pulse signal clamped to the low voltage power rail into a positive voltage pulse signal; a comparator circuit: the positive voltage pulse signal output by the amplifying circuit is compared with the output of the reference power supply circuit, and the comparator circuit is utilized; pulse extension circuit: the monostable multivibrator chip is triggered to extend the fixed voltage pulse output by the comparator circuit to a fixed pulse width signal and output the signal. The invention sets positive pulse trigger signals with positive and low voltage and fixed pulse width in high-voltage short-time pulse within a certain range, and can effectively interface other instruments, such as triggering synchronization of oscilloscopes, waveform generators, spectrum analyzers and other ultrasonic instruments.
Description
Technical Field
The invention relates to the technical field of circuit design, in particular to an ultrasonic high-voltage pulse synchronous trigger output circuit.
Background
Exciting an ultrasonic transducer often requires a high voltage, covering tens to thousands of V, while other detection units or measurement instruments need to acquire this pulse in time for synchronous operation, but other instruments often cannot accept such high voltage and pulses as short as 10ns class, thus requiring circuitry to set this pulse to a low voltage (e.g. 5V), widening the pulse width to a level of 10us or even longer, in order to synchronize the two instruments at the moment of triggering.
At present, the high voltage pulse is converted to the low voltage mainly through the voltage dividing resistor, and then is directly used as shown in fig. 7.
The disadvantage of the circuit of fig. 7 is that the output pulse width is identical to the input pulse width and the clamping voltages of D1, D2 are fixed without the subsequent reception of a synchronous trigger, in particular of an external instrument.
The invention aims to provide a circuit for setting a certain range of high-voltage input, fixing low voltage and fixing pulse width, which can effectively solve the problems of synchronous pulse stability and external trigger adaptation of most instruments.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the ultrasonic high-voltage pulse synchronous trigger output circuit, which is a circuit for inputting a certain range of high voltage into a fixed position and fixing low voltage and fixed pulse width, and can effectively solve the problems of synchronous pulse stability and external trigger adaptation of most instruments.
In order to solve the technical problems, the following technical scheme is adopted:
The ultrasonic high-voltage pulse synchronous triggering output circuit comprises a voltage dividing circuit, a clamping circuit, an amplifying circuit, a comparator circuit and a pulse extension circuit,
The voltage dividing circuit: dividing the voltage through a resistor of a voltage dividing circuit, and converting the high-voltage pulse into a low-voltage pulse signal;
The clamping circuit: clamping an input low-voltage pulse signal to a low-voltage power supply rail through a group of diodes;
the amplifying circuit: for converting the low voltage pulse signal clamped to the low voltage power rail into a positive voltage pulse signal;
the comparator circuit: the comparator circuit is used for comparing the positive voltage pulse signal output by the amplifying circuit with the output of the reference power supply circuit, and outputting a fixed voltage pulse if the positive voltage pulse signal output by the amplifying circuit is larger than the pulse signal output by the reference power supply, otherwise, outputting no pulse signal;
the pulse extension circuit: the monostable multivibrator chip is triggered to extend the fixed voltage pulse output by the comparator circuit to a fixed pulse width signal and output the signal.
Further, the high voltage pulse includes a positive high voltage pulse and a negative high voltage pulse,
The positive high-voltage pulse outputs a positive pulse signal under the action of the voltage dividing circuit and the clamping circuit;
the negative high-voltage pulse outputs a negative pulse signal under the action of the voltage dividing circuit and the clamping circuit.
Further, the amplifying circuit comprises a reverse amplifying circuit and a forward amplifying circuit,
When the input pulse is a positive high-voltage pulse, converting a pulse signal clamped to a low-voltage power supply rail into a positive voltage pulse signal through a positive amplification circuit;
When the input pulse is a negative high voltage pulse, the low voltage pulse signal clamped on the low voltage power supply rail is converted into a positive voltage pulse signal through the reverse amplifying circuit.
Further, when the input pulse is a positive high voltage pulse or a negative high voltage pulse, an or circuit is provided between the comparator circuit output of the negative high voltage pulse path and the comparator circuit output of the positive high voltage pulse path when the pulse signal clamped to the low voltage power supply rail is converted into a positive voltage pulse signal by the amplifying circuit.
Further, the voltage dividing circuit comprises a resistor R3, a resistor R2, a resistor R4 and a resistor R5, wherein one end of the resistor R3 is connected with the resistor R2 and the socket E in series, the other end of the resistor R3 is grounded, the resistor R2 is connected with the resistor R4 and the resistor R5 in parallel, one ends of the resistor R4 and the resistor R5 are grounded, and the other ends of the resistor R4 and the resistor R5 are connected with the clamping circuit.
Further, the clamping circuit comprises a first Schottky diode and a second Schottky diode, the first Schottky diode and the second Schottky diode are connected in parallel, the positive electrode end of the first Schottky diode is connected with the negative pressure end of the voltage U, the negative electrode end of the first Schottky diode is connected with the voltage dividing circuit, the positive electrode end of the second Schottky diode is connected with the voltage dividing circuit, and the negative electrode end of the first Schottky diode is connected with the positive pressure end of the voltage U.
Further, the amplifying circuit comprises an operational amplifier U, and a1 pin of the operational amplifier U is respectively connected with a capacitor C16 and a capacitor R20; the 2 pin of the operational amplifier U is respectively connected with a resistor R21 and a capacitor C16 and R20, the resistor R21 is respectively connected with a resistor R23 and a resistor R24, and the resistors R23 and R24 are respectively grounded; the 3 pin of the operational amplifier U is connected with a resistor R25, and the resistor R25 is grounded; the 4 pin of the operational amplifier U is connected with a capacitor C18 and a capacitor C19 respectively, and the other ends of the capacitor C18 and the capacitor C19 are grounded respectively; the 5 pins of the operational amplifier U are respectively connected with a resistor R26 and a capacitor C22, the other end of the resistor R26 is connected with a capacitor C21, the capacitor C21 is grounded, and the other end of the capacitor C22 is grounded; the 6 pin of the operational amplifier U is connected with a resistor R22, the resistor R22 is connected with a resistor R27, and the resistor R27 is grounded; the pin 7 of the operational amplifier U is connected with a capacitor C15 and a capacitor C17 respectively, and the other ends of the capacitor C15 and the capacitor C17 are grounded respectively; and the 9 pin of the operational amplifier U is grounded.
Further, the comparator circuit comprises a voltage comparator U6, wherein a capacitor C43, a capacitor C64, a capacitor C65 and a capacitor C66 are respectively connected to a pin 1, a pin 8, a pin 9 and a pin 16 of the voltage comparator U6, and the other ends of the capacitor C43, the capacitor C64, the capacitor C65 and the capacitor C66 are respectively grounded; the pin 2, the pin 7, the pin 10 and the pin 15 of the voltage comparator U6 are connected with the amplifying circuit, the pin 3 of the voltage comparator U6 is grounded, the pin 4 of the voltage comparator U6 is connected with a resistor R52, and the other end of the resistor R52 is grounded; a pin 5 of the voltage comparator U6 is connected with a resistor R53, and the other end of the resistor R53 is grounded; the pin 6 of the voltage comparator U6 is connected with the negative end of the voltage U; the pin 11 of the voltage comparator U6 is connected with a capacitor C44, and the other end of the capacitor C44 is grounded; the pin 12 of the voltage comparator U6 is connected with a resistor R54, and the other end of the resistor R54 is grounded; the pin 13 of the voltage comparator U6 is connected with a resistor R55, and the other end of the resistor R55 is grounded; the pin 14 of the voltage comparator U6 is connected to the positive terminal of the voltage U.
Further, the comparator circuit further comprises a voltage comparator U7, wherein a resistor R56, a capacitor C50 and a capacitor C49 are respectively connected to a pin 2 of the voltage comparator U7, the other end of the resistor R56 is connected with a resistor R59, and the other ends of the capacitor C50 and the capacitor C49 are grounded; the pin 3 of the voltage comparator U7 is respectively connected with the resistor R56 and the resistor R59, and the resistor R59 is grounded; the pin 6 of the voltage comparator U7 is connected with a resistor R57, the other end of the resistor R57 is respectively connected with a resistor R58 and a capacitor C51, and the other ends of the resistor R58 and the capacitor C51 are grounded;
Further, the pulse extension circuit comprises a trigger monostable multivibrator chip U, and a pin 1, a pin 8 and a pin 9 of the trigger monostable multivibrator chip U are grounded; the pin 2 of the trigger monostable multivibrator chip U is connected with the comparator circuit; the pin 3 of the trigger monostable multivibrator chip U is connected with the positive terminal of the voltage U; the pin 5 of the trigger monostable multivibrator chip U is connected with a resistor R65, the resistor R65 is connected with a resistor R60, and the resistor R60 is connected with the positive terminal of the voltage U; the pin 6 of the trigger monostable multivibrator chip U is connected with a capacitor C58, the capacitor C58 is connected with a resistor R60, and the resistor R60 is connected with the positive terminal of the voltage U; the pin 7 of the trigger monostable multivibrator chip U is connected with a resistor R60, and the resistor R60 is connected with the positive end of the voltage U; the pin 10 of the trigger monostable multivibrator chip U is connected with the comparator circuit; the pin 11 of the trigger monostable multivibrator chip U is connected with a resistor R63, and the resistor R63 is connected with the positive end of the voltage U; the pin 13 of the trigger monostable multivibrator chip U is respectively connected with a resistor R63 and a resistor R64, the resistor R63 is connected with the positive end of the voltage U, the pin 14 of the trigger monostable multivibrator chip U is connected with a capacitor C57, the capacitor C57 is connected with a resistor R62, and the resistor R62 is connected with the positive end of the voltage U; the pin 15 of the trigger monostable multivibrator chip U is connected with a resistor R62, and the resistor R62 is connected with the positive end of the voltage U; the pin 16 of the trigger monostable multivibrator chip U is respectively connected with the positive terminal of the voltage U and the capacitor C56, and the other end of the capacitor C56 is grounded.
Due to the adoption of the technical scheme, the method has the following beneficial effects:
the invention relates to an ultrasonic high-voltage pulse synchronous trigger output circuit, which is a positive pulse trigger signal which is positive, low-voltage and fixed in pulse width and is set to positive high-voltage or negative high-voltage short-time pulse in a certain range, and can be effectively connected with other instruments such as an oscilloscope, a waveform generator, a spectrum analyzer and other ultrasonic instruments in a trigger synchronous way.
Drawings
The invention is further described below with reference to the accompanying drawings:
Fig. 1 is a schematic diagram of the working principle of the negative high-voltage pulse input in the ultrasonic high-voltage pulse synchronous trigger output circuit in embodiment 1 of the present invention;
Fig. 2 is a schematic diagram of the working principle of the negative high-voltage pulse input or the positive high-voltage pulse input in the ultrasonic high-voltage pulse synchronous trigger output circuit in embodiment 2 of the present invention;
FIG. 3 is a schematic diagram of a voltage divider circuit and a clamp circuit according to the present invention;
FIG. 4 is a schematic circuit diagram of an amplifying circuit according to the present invention;
FIG. 5 is a schematic circuit diagram of a comparator circuit according to the present invention;
FIG. 6 is a schematic circuit diagram of a pulse extension circuit according to the present invention;
Fig. 7 is a schematic circuit diagram of a synchronous trigger output circuit according to the prior art in the background of the invention.
Detailed Description
The present invention will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
As shown in fig. 1-6, the ultrasonic high-voltage pulse synchronous trigger output circuit comprises a voltage dividing circuit, a clamping circuit, an amplifying circuit, a comparator circuit and a pulse extension circuit,
The voltage dividing circuit: dividing the voltage through a resistor of a voltage dividing circuit, and converting the high-voltage pulse into a low-voltage pulse signal;
The clamping circuit: clamping an input low-voltage pulse signal to a low-voltage power supply rail through a group of diodes;
the amplifying circuit: for converting the low voltage pulse signal clamped to the low voltage power rail into a positive voltage pulse signal;
the comparator circuit: the comparator circuit is used for comparing the positive voltage pulse signal output by the amplifying circuit with the output of the reference power supply circuit, and outputting a fixed voltage pulse if the positive voltage pulse signal output by the amplifying circuit is larger than the pulse signal output by the reference power supply, otherwise, outputting no pulse signal;
the pulse extension circuit: the monostable multivibrator chip is triggered to extend the fixed voltage pulse output by the comparator circuit to a fixed pulse width signal and output the signal.
The high voltage pulse includes a positive high voltage pulse and a negative high voltage pulse, and further, the amplifying circuit includes a reverse amplifying circuit and a forward amplifying circuit. The positive high-voltage pulse outputs a positive pulse signal under the action of the voltage dividing circuit and the clamping circuit; the negative high-voltage pulse outputs a negative pulse signal under the action of the voltage dividing circuit and the clamping circuit.
According to the scheme of the ultrasonic high-voltage pulse synchronous triggering output circuit, through positive high-voltage or negative high-voltage short-time pulses in a certain range, positive pulse triggering signals which are positive, low-voltage and fixed in pulse width are set, and triggering synchronization of other instruments such as oscilloscopes, waveform generators, spectrum analyzers and other ultrasonic instruments can be effectively achieved.
Specifically, in the whole ultrasonic high-voltage pulse synchronous trigger output circuit, 1 group or multiple groups can be arranged, and four groups are arranged in the drawing. The following of the invention is explained for a group.
Referring to fig. 3, in particular, the voltage dividing circuit and the clamping circuit are provided with four groups, and the present invention is described with respect to the uppermost socket E1, resistor R4 and schottky diode D4 in fig. 3.
Specifically, the voltage dividing circuit comprises a resistor R3, a resistor R2, a resistor R4 and a resistor R5, wherein one end of the resistor R3 is connected with the resistor R2 and a socket E in series, the other end of the resistor R3 is grounded, the resistor R2 is connected with the resistor R4 and the resistor R5 in parallel, one ends of the resistor R4 and the resistor R5 are grounded, and the other ends of the resistor R4 and the resistor R5 are connected with the clamping circuit.
Referring to fig. 3, specifically, the clamping circuit includes a first schottky diode and a second schottky diode, the first schottky diode and the second schottky diode are connected in parallel, a positive terminal of the first schottky diode is connected to a negative terminal of the voltage U, a negative terminal of the first schottky diode is connected to the voltage dividing circuit, a positive terminal of the second schottky diode is connected to the voltage dividing circuit, and a negative terminal of the first schottky diode is connected to a positive terminal of the voltage U.
Referring to fig. 4, in particular, the amplifying circuit is provided with four groups, and the present invention is described with respect to the uppermost operational amplifier U2 in fig. 4.
The amplifying circuit comprises an operational amplifier U, wherein a1 pin of the operational amplifier U is respectively connected with a capacitor C16 and a capacitor R20; the 2 pin of the operational amplifier U is respectively connected with a resistor R21 and a capacitor C16 and R20, the resistor R21 is respectively connected with a resistor R23 and a resistor R24, and the resistors R23 and R24 are respectively grounded; the 3 pin of the operational amplifier U is connected with a resistor R25, and the resistor R25 is grounded; the 4 pin of the operational amplifier U is connected with a capacitor C18 and a capacitor C19 respectively, and the other ends of the capacitor C18 and the capacitor C19 are grounded respectively; the 5 pins of the operational amplifier U are respectively connected with a resistor R26 and a capacitor C22, the other end of the resistor R26 is connected with a capacitor C21, the capacitor C21 is grounded, and the other end of the capacitor C22 is grounded; the 6 pin of the operational amplifier U is connected with a resistor R22, the resistor R22 is connected with a resistor R27, and the resistor R27 is grounded; the pin 7 of the operational amplifier U is connected with a capacitor C15 and a capacitor C17 respectively, and the other ends of the capacitor C15 and the capacitor C17 are grounded respectively; and the 9 pin of the operational amplifier U is grounded.
Referring to fig. 5, specifically, the comparator circuit includes a voltage comparator U6, where a capacitor C43, a capacitor C64, a capacitor C65, and a capacitor C66 are connected to a pin 1, a pin 8, a pin 9, and a pin 16 of the voltage comparator U6, and the other ends of the capacitor C43, the capacitor C64, the capacitor C65, and the capacitor C66 are grounded, respectively; the pin 2, the pin 7, the pin 10 and the pin 15 of the voltage comparator U6 are connected with the amplifying circuit, the pin 3 of the voltage comparator U6 is grounded, the pin 4 of the voltage comparator U6 is connected with a resistor R52, and the other end of the resistor R52 is grounded; a pin 5 of the voltage comparator U6 is connected with a resistor R53, and the other end of the resistor R53 is grounded; the pin 6 of the voltage comparator U6 is connected with the negative end of the voltage U; the pin 11 of the voltage comparator U6 is connected with a capacitor C44, and the other end of the capacitor C44 is grounded; the pin 12 of the voltage comparator U6 is connected with a resistor R54, and the other end of the resistor R54 is grounded; the pin 13 of the voltage comparator U6 is connected with a resistor R55, and the other end of the resistor R55 is grounded; the pin 14 of the voltage comparator U6 is connected to the positive terminal of the voltage U.
Referring to fig. 5, specifically, the comparator circuit further includes a voltage comparator U7, a resistor R56, a capacitor C50 and a capacitor C49 are connected to a pin 2 of the voltage comparator U7, another end of the resistor R56 is connected to a resistor R59, and another ends of the capacitor C50 and the capacitor C49 are grounded; the pin 3 of the voltage comparator U7 is respectively connected with the resistor R56 and the resistor R59, and the resistor R59 is grounded; the pin 6 of the voltage comparator U7 is connected with a resistor R57, the other end of the resistor R57 is respectively connected with a resistor R58 and a capacitor C51, and the other ends of the resistor R58 and the capacitor C51 are grounded.
Referring to fig. 6, in particular, the pulse extension circuit includes a trigger monostable multivibrator chip U, whose pins 1, 8 and 9 are grounded; the pin 2 of the trigger monostable multivibrator chip U is connected with the comparator circuit; the pin 3 of the trigger monostable multivibrator chip U is connected with the positive terminal of the voltage U; the pin 5 of the trigger monostable multivibrator chip U is connected with a resistor R65, the resistor R65 is connected with a resistor R60, and the resistor R60 is connected with the positive terminal of the voltage U; the pin 6 of the trigger monostable multivibrator chip U is connected with a capacitor C58, the capacitor C58 is connected with a resistor R60, and the resistor R60 is connected with the positive terminal of the voltage U; the pin 7 of the trigger monostable multivibrator chip U is connected with a resistor R60, and the resistor R60 is connected with the positive end of the voltage U; the pin 10 of the trigger monostable multivibrator chip U is connected with the comparator circuit; the pin 11 of the trigger monostable multivibrator chip U is connected with a resistor R63, and the resistor R63 is connected with the positive end of the voltage U; the pin 13 of the trigger monostable multivibrator chip U is respectively connected with a resistor R63 and a resistor R64, the resistor R63 is connected with the positive end of the voltage U, the pin 14 of the trigger monostable multivibrator chip U is connected with a capacitor C57, the capacitor C57 is connected with a resistor R62, and the resistor R62 is connected with the positive end of the voltage U; the pin 15 of the trigger monostable multivibrator chip U is connected with a resistor R62, and the resistor R62 is connected with the positive end of the voltage U; the pin 16 of the trigger monostable multivibrator chip U is respectively connected with the positive terminal of the voltage U and the capacitor C56, and the other end of the capacitor C56 is grounded.
Example 1
Referring to fig. 1, as embodiment 1 of the present invention, when an input pulse is a negative high voltage pulse, a pulse signal clamped to a low voltage power supply rail is converted into a positive voltage pulse signal by an inverting amplification circuit.
Example 2
Referring to fig. 2, as embodiment 1 of the present invention, when an input pulse is a negative high voltage pulse or a positive high voltage pulse, a low voltage pulse signal clamped to a low voltage power rail is converted into a positive voltage pulse signal by an inverting amplifier circuit or a forward amplifier circuit. In this embodiment, the output pulse width is adjustable, and by adjusting the resistance-capacitance value of the retriggerable monostable multivibrator, the output pulse width can be adjusted.
Example 3
Referring to fig. 2, as embodiment 3 of the present invention, when the input pulse is a positive high voltage pulse or a negative high voltage pulse, and the pulse signal clamped to the low voltage power rail is converted into a positive voltage pulse signal by the amplifying circuit, the comparator circuit output of the negative high voltage pulse path and the comparator circuit output of the positive high voltage pulse path are provided with an or circuit, on the basis of embodiment 2. The purpose of the or circuit is to amplify and compare the positive pulses of ultrasound. When the negative pulse is generated, the negative pulse is amplified to positive signal in reverse direction, and then compared. Therefore, the positive amplifying circuit can recognize whether the high-voltage positive pulse or the high-voltage negative pulse and output the low-voltage synchronous pulse.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made on the basis of the present invention to solve the substantially same technical problems and achieve the substantially same technical effects are encompassed within the scope of the present invention.
Claims (9)
1. The ultrasonic high-voltage pulse synchronous triggering output circuit comprises a voltage dividing circuit, a clamping circuit, an amplifying circuit, a comparator circuit and a pulse extension circuit,
The voltage dividing circuit: dividing the voltage through a resistor of a voltage dividing circuit, and converting the high-voltage pulse into a low-voltage pulse signal;
The clamping circuit: clamping an input low-voltage pulse signal to a low-voltage power supply rail through a group of diodes;
the amplifying circuit: for converting the low voltage pulse signal clamped to the low voltage power rail into a positive voltage pulse signal;
The comparator circuit: the comparator circuit is used for comparing the positive voltage pulse signal output by the amplifying circuit with the output of the reference power supply circuit, and outputting a fixed voltage pulse if the positive voltage pulse signal output by the amplifying circuit is larger than the pulse signal output by the reference power supply, otherwise, outputting no pulse signal;
The pulse extension circuit: the monostable multivibrator chip is triggered to extend the fixed voltage pulse output by the comparator circuit to a fixed pulse width signal and output the signal;
The comparator circuit comprises a voltage comparator U6, wherein a capacitor C43, a capacitor C64, a capacitor C65 and a capacitor C66 are respectively connected with a pin 1, a pin 8, a pin 9 and a pin 16 of the voltage comparator U6, and the other ends of the capacitor C43, the capacitor C64, the capacitor C65 and the capacitor C66 are respectively grounded; the pin 2, the pin 7, the pin 10 and the pin 15 of the voltage comparator U6 are connected with the amplifying circuit, the pin 3 of the voltage comparator U6 is grounded, the pin 4 of the voltage comparator U6 is connected with a resistor R52, and the other end of the resistor R52 is grounded; a pin 5 of the voltage comparator U6 is connected with a resistor R53, and the other end of the resistor R53 is grounded; the pin 6 of the voltage comparator U6 is connected with the negative end of the voltage U; the pin 11 of the voltage comparator U6 is connected with a capacitor C44, and the other end of the capacitor C44 is grounded; the pin 12 of the voltage comparator U6 is connected with a resistor R54, and the other end of the resistor R54 is grounded; the pin 13 of the voltage comparator U6 is connected with a resistor R55, and the other end of the resistor R55 is grounded; the pin 14 of the voltage comparator U6 is connected to the positive terminal of the voltage U.
2. The ultrasonic high voltage pulse synchronous trigger output circuit according to claim 1, wherein: the high voltage pulses include positive high voltage pulses and negative high voltage pulses,
The positive high-voltage pulse outputs a positive pulse signal under the action of the voltage dividing circuit and the clamping circuit;
the negative high-voltage pulse outputs a negative pulse signal under the action of the voltage dividing circuit and the clamping circuit.
3. The ultrasonic high voltage pulse synchronous trigger output circuit according to claim 2, wherein: the amplifying circuit comprises a reverse amplifying circuit and a forward amplifying circuit,
When the input pulse is a positive high-voltage pulse, converting a pulse signal clamped to a low-voltage power supply rail into a positive voltage pulse signal through a positive amplification circuit;
When the input pulse is a negative high voltage pulse, the low voltage pulse signal clamped on the low voltage power supply rail is converted into a positive voltage pulse signal through the reverse amplifying circuit.
4. The ultrasonic high voltage pulse synchronous trigger output circuit according to claim 3, wherein: further, when the input pulse is a positive high voltage pulse or a negative high voltage pulse, an or circuit is provided between the comparator circuit output of the negative high voltage pulse path and the comparator circuit output of the positive high voltage pulse path when the pulse signal clamped to the low voltage power supply rail is converted into a positive voltage pulse signal by the amplifying circuit.
5. The ultrasonic high voltage pulse synchronous trigger output circuit according to claim 1, wherein: the voltage dividing circuit comprises a resistor R3, a resistor R2, a resistor R4 and a resistor R5, wherein one end of the resistor R3 is connected with the resistor R2 and a socket E in series, the other end of the resistor R3 is grounded, the resistor R2 is connected with the resistor R4 and the resistor R5 in parallel, one ends of the resistor R4 and the resistor R5 are grounded, and the other ends of the resistor R4 and the resistor R5 are connected with the clamping circuit.
6. The ultrasonic high voltage pulse synchronous trigger output circuit according to claim 5, wherein: the clamping circuit comprises a first Schottky diode and a second Schottky diode, the first Schottky diode and the second Schottky diode are connected in parallel, the positive electrode end of the first Schottky diode is connected with the negative pressure end of the voltage U, the negative electrode end of the first Schottky diode is connected with the voltage dividing circuit, the positive electrode end of the second Schottky diode is connected with the voltage dividing circuit, and the negative electrode end of the first Schottky diode is connected with the positive pressure end of the voltage U.
7. The ultrasonic high voltage pulse synchronous trigger output circuit according to claim 6, wherein: the amplifying circuit comprises an operational amplifier U, wherein a1 pin of the operational amplifier U is respectively connected with a capacitor C16 and a resistor R20; the 2 pin of the operational amplifier U is respectively connected with a resistor R21 and a capacitor C16 and R20, the resistor R21 is respectively connected with a resistor R23 and a resistor R24, and the resistors R23 and R24 are respectively grounded; the 3 pin of the operational amplifier U is connected with a resistor R25, and the resistor R25 is grounded; the 4 pin of the operational amplifier U is connected with a capacitor C18 and a capacitor C19 respectively, and the other ends of the capacitor C18 and the capacitor C19 are grounded respectively; the 5 pins of the operational amplifier U are respectively connected with a resistor R26 and a capacitor C22, the other end of the resistor R26 is connected with a capacitor C21, the capacitor C21 is grounded, and the other end of the capacitor C22 is grounded; the 6 pin of the operational amplifier U is connected with a resistor R22, the resistor R22 is connected with a resistor R27, and the resistor R27 is grounded; the pin 7 of the operational amplifier U is connected with a capacitor C15 and a capacitor C17 respectively, and the other ends of the capacitor C15 and the capacitor C17 are grounded respectively; and the 9 pin of the operational amplifier U is grounded.
8. The ultrasonic high voltage pulse synchronous trigger output circuit according to claim 1, wherein: the comparator circuit further comprises a voltage comparator U7, wherein a resistor R56, a capacitor C50 and a capacitor C49 are respectively connected to a pin 2 of the voltage comparator U7, the other end of the resistor R56 is connected with a resistor R59, and the other ends of the capacitor C50 and the capacitor C49 are grounded; the pin 3 of the voltage comparator U7 is respectively connected with the resistor R56 and the resistor R59, and the resistor R59 is grounded; the pin 6 of the voltage comparator U7 is connected with a resistor R57, the other end of the resistor R57 is respectively connected with a resistor R58 and a capacitor C51, and the other ends of the resistor R58 and the capacitor C51 are grounded.
9. The ultrasonic high voltage pulse synchronous trigger output circuit according to claim 1, wherein: the pulse extension circuit comprises a trigger monostable multivibrator chip U, wherein a pin 1, a pin 8 and a pin 9 of the trigger monostable multivibrator chip U are grounded; the pin 2 of the trigger monostable multivibrator chip U is connected with the comparator circuit; the pin 3 of the trigger monostable multivibrator chip U is connected with the positive terminal of the voltage U; the pin 5 of the trigger monostable multivibrator chip U is connected with a resistor R65, the resistor R65 is connected with a resistor R60, and the resistor R60 is connected with the positive terminal of the voltage U; the pin 6 of the trigger monostable multivibrator chip U is connected with a capacitor C58, the capacitor C58 is connected with a resistor R60, and the resistor R60 is connected with the positive terminal of the voltage U; the pin 7 of the trigger monostable multivibrator chip U is connected with a resistor R60, and the resistor R60 is connected with the positive end of the voltage U; the pin 10 of the trigger monostable multivibrator chip U is connected with the comparator circuit; the pin 11 of the trigger monostable multivibrator chip U is connected with a resistor R63, and the resistor R63 is connected with the positive end of the voltage U; the pin 13 of the trigger monostable multivibrator chip U is respectively connected with a resistor R63 and a resistor R64, the resistor R63 is connected with the positive end of the voltage U, the pin 14 of the trigger monostable multivibrator chip U is connected with a capacitor C57, the capacitor C57 is connected with a resistor R62, and the resistor R62 is connected with the positive end of the voltage U; the pin 15 of the trigger monostable multivibrator chip U is connected with a resistor R62, and the resistor R62 is connected with the positive end of the voltage U; the pin 16 of the trigger monostable multivibrator chip U is respectively connected with the positive terminal of the voltage U and the capacitor C56, and the other end of the capacitor C56 is grounded.
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| CN116243360A (en) * | 2023-03-14 | 2023-06-09 | 福州智元仪器设备有限公司 | A GM tube pulse shaping and overload indicating circuit |
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