CN117784659A - High-speed isolation digital quantity output board card with self-adaptive output voltage - Google Patents
High-speed isolation digital quantity output board card with self-adaptive output voltage Download PDFInfo
- Publication number
- CN117784659A CN117784659A CN202311663598.8A CN202311663598A CN117784659A CN 117784659 A CN117784659 A CN 117784659A CN 202311663598 A CN202311663598 A CN 202311663598A CN 117784659 A CN117784659 A CN 117784659A
- Authority
- CN
- China
- Prior art keywords
- voltage
- output
- triode
- signal
- adaptive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002955 isolation Methods 0.000 title claims abstract description 68
- 230000003321 amplification Effects 0.000 claims abstract description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 8
- 230000003044 adaptive effect Effects 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 9
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 claims description 8
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 5
- 238000004088 simulation Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
Landscapes
- Amplifiers (AREA)
Abstract
The invention discloses a high-speed isolation digital quantity output board card with self-adaptive output voltage, belonging to the technical field of equipment simulation, comprising: the high-speed isolation module, the voltage amplification and current driving circuit, the voltage self-adaptive circuit and the external interface; the input end of the voltage amplification and current driving circuit is respectively connected with the output end of the high-speed isolation module and the output end of the voltage self-adaptive circuit, the output end of the voltage amplification and current driving circuit is connected with the external interface, and the external interface is an input power supply of the input end of the voltage self-adaptive circuit; the high-speed isolation module converts an input digital signal into a first voltage signal and outputs the first voltage signal; the voltage amplifying and current driving circuit receives the first voltage signal and the second voltage signal input by the voltage self-adaptive circuit, processes the first voltage signal and the second voltage signal to generate a voltage self-adaptive digital quantity signal and outputs the voltage self-adaptive digital quantity signal to the external interface, and the board card can support high-speed and high-voltage digital quantity output.
Description
Technical Field
The invention relates to the technical field of equipment simulation, in particular to an output voltage self-adaptive high-speed isolation digital quantity output board card.
Background
At present, with the continuous development of technologies in the fields of aerospace, rail transit, smart grids and the like, the complexity of a real-time simulation system is also higher and higher, so that higher and higher requirements are also put forward on a core hardware equipment simulator in the system. In order to meet the increasingly complex real-time simulation system under different requirements of different fields such as industrial control, electric power, automobiles and the like and different projects, an isolated high-speed digital quantity output board card becomes a design key point.
In order to meet the design requirement of isolation, the traditional digital quantity output board card has 3 design schemes, namely optical coupling isolation, magnetic isolation and capacity isolation. The optical coupler isolation output speed is low, and the requirement of digital high-speed output cannot be met. The output voltage ranges of the magnetic isolation and the capacitive isolation are limited, and high-voltage output cannot be realized.
Disclosure of Invention
The embodiment of the invention aims to provide a high-speed isolation digital quantity output board card with self-adaptive output voltage, which can solve the problem that the existing board card cannot meet the requirements of digital high-speed and high-voltage output.
In order to solve the technical problems, the invention provides the following technical scheme:
the embodiment of the invention provides a high-speed isolation digital quantity output board card with self-adaptive output voltage, wherein the board card comprises: the high-speed isolation module, the voltage amplification and current driving circuit, the voltage self-adaptive circuit and the external interface;
the input end of the voltage amplification and current driving circuit is respectively connected with the output end of the high-speed isolation module and the output end of the voltage self-adaptive circuit, the output end of the voltage amplification and current driving circuit is connected with the external interface, and the external interface is an input power supply of the input end of the voltage self-adaptive circuit;
the high-speed isolation module converts an input digital signal into a first voltage signal and outputs the first voltage signal; the voltage amplifying and current driving circuit receives the first voltage signal and the second voltage signal input by the voltage self-adapting circuit, processes the first voltage signal and the second voltage signal to generate a voltage self-adapting digital quantity signal and outputs the voltage self-adapting digital quantity signal to the external interface.
Optionally, the voltage amplifying and current driving circuit comprises a first circuit branch and a second circuit branch;
the first circuit branch includes: a first resistor R1 and a second resistor R2 connected in series between the power source VCC1 and the first ground GND; the common end of the first resistor R1 and the second resistor R2 outputs a digital signal, and the common end is connected with the non-inverting input end of the first operational amplifier U1A; the inverting input end of the first operational amplifier U1A receives one output signal CH01 of the high-speed isolation module, and the output end of the first operational amplifier U1A is respectively connected with the base electrode of the first triode Q1 and the base electrode of the second triode Q2 and is connected with the emitter electrode of the first triode Q1 and the emitter electrode of the second triode Q2 after passing through a ninth resistor R9;
the common end of the emitter of the first triode Q1 and the emitter of the second triode Q2 is used as an output end DOCH1 of the voltage amplifying and current driving circuit;
the power supply voltage end of the first operational amplifier U1A is connected with the output end of the voltage self-adaptive circuit, receives VCC2 output by the voltage self-adaptive circuit, and the grounding end is connected with the first grounding end GND; a first capacitor C3 is connected between the power supply voltage end of the first operational amplifier U1A and the first ground GND;
the collector of the first triode Q1 is connected with the output end of the voltage self-adaptive circuit, and the collector of the second triode Q2 is connected with the second grounding end GND 1; the output end of the first operational amplifier U1A is connected with the inverting input end;
the second circuit branch includes: a third resistor R3 and a fourth resistor R4 connected in series between the power supply VCC1 and the first ground GND; the common end of the third resistor R3 and the fourth resistor R4 outputs a digital signal, and the common end is connected with the non-inverting input end of the second operational amplifier U1B; the inverting input end of the second operational amplifier U1B receives one output signal CH02 of the high-speed isolation module; the output end of the second operational amplifier U1B is respectively connected with the base electrode of the third triode Q3, the base electrode of the fourth triode Q4 and the emitter electrode of the third triode Q3 and the emitter electrode of the fourth triode Q4 after passing through a tenth resistor R10;
the common end of the emitter of the third triode Q3 and the emitter of the fourth triode Q4 is used as an output end DOCH2 of the voltage amplifying and current driving circuit;
the collector of the third triode Q3 is connected with the output end of the voltage self-adaptive circuit, and the collector of the fourth triode Q4 is connected with the second grounding end GND 1; the output end of the second operational amplifier U1B is connected with the inverting input end.
Optionally, a fifth resistor R5 is connected in series between the inverting input end of the first operational amplifier U1A and the output end of the output signal CH01 of the high-speed isolation module;
and a sixth resistor R6 is connected in series between the inverting input end of the second operational amplifier U1B and the output end of one output signal CH02 of the high-speed isolation module.
Optionally, a second capacitor C1 and a seventh resistor R7 are connected in parallel between the inverting input terminal and the output terminal of the first operational amplifier U1A.
Optionally, a third capacitor C2 and an eighth resistor R8 are connected in parallel between the inverting input terminal and the output terminal of the second operational amplifier U1B.
Optionally, the first triode Q1 and the third triode Q3 are NPN type triodes; the second triode Q2 and the fourth triode Q4 are PNP type triodes.
Optionally, a first self-recovery fuse F1 is connected in series between the common connection end of the first triode Q1, the second triode Q2 and the ninth resistor R9 and the output end of the first circuit branch;
and a second self-recovery fuse F2 is connected in series between the common connection end of the third triode Q3, the fourth triode Q4 and the tenth resistor R10 and the output end of the second circuit branch.
Optionally, the high-speed isolation module is a high-speed digital isolation chip.
Optionally, the voltage value of the first voltage signal is 3.5V or 5V.
The high-speed isolation digital quantity output board card with the self-adaptive output voltage comprises a high-speed isolation module, a voltage amplification and current drive circuit, a voltage self-adaptive circuit and an external interface, wherein the board card can convert an internal digital quantity standard level signal, namely a digital signal, into a 3.5V-60V voltage self-adaptive digital quantity signal for output, can support an output signal with the maximum 150MHz rate, can support high-speed and high-voltage digital quantity output, and has adjustable voltage output and large range; moreover, the high-speed isolation module arranged on the board card can isolate the input end from the post-stage processing circuit, so that the board card has an isolation protection function.
Drawings
FIG. 1 is a schematic diagram of a high-speed isolation digital quantity output board card with adaptive output voltage according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating a high-speed isolation module according to an embodiment of the present application;
fig. 3 is a schematic diagram showing a structure of a voltage amplifying and current driving circuit according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The output voltage adaptive high-speed isolation digital quantity output board card provided by the embodiment of the application is described in detail below through specific embodiments and application scenes thereof with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an output voltage adaptive high-speed isolation digital quantity output board card according to an embodiment of the present application. As shown in fig. 1, the board card includes:
the high-speed isolation module 101, the voltage amplification and current driving circuit 102, the voltage self-adaptive circuit 103 and the external interface 104;
the input end of the voltage amplification and current driving circuit 102 is respectively connected with the output end of the high-speed isolation module 101 and the output end of the voltage self-adaptive circuit 103, the output end of the voltage amplification and current driving circuit 102 is connected with the external interface 104, and the external interface 104 is the input end of the voltage self-adaptive circuit 103 for inputting power;
the high-speed isolation module 101 converts an input digital signal (standard digital signal) into a first voltage signal and outputs the first voltage signal; the voltage amplifying and current driving circuit 102 receives the first voltage signal and the second voltage signal input by the voltage adaptive circuit 103, processes the first voltage signal and the second voltage signal to generate a voltage adaptive digital value signal, and outputs the voltage adaptive digital value signal to the external interface 104. The output voltage self-adaptive digital quantity signal has the voltage range of 3.5V-60V, and the output voltage self-adaptive range is wide and the use is convenient.
The standard digital signal is input to the high-speed isolation module 101, which supports a bandwidth of up to 150 MHz. The high-speed isolation module 101 has the function of blocking high voltage, isolating ground and preventing noise current from entering the local ground, interfering with or damaging sensitive circuitry.
Optionally, the high-speed isolation module is a high-speed digital isolation chip. An exemplary high-speed isolation module is schematically shown in fig. 2, and an input signal is input into a high-speed digital isolation chip and is processed by the high-speed digital isolation chip to output a signal.
The input signal is typically a standard digital quantity signal provided by an FPGA or MCU core device, and the output signal, i.e., the first voltage signal, is a supply voltage signal of the high-speed isolation IC. The voltage value of the first voltage signal is 3.5V or 5V. It should be noted that, the board card provided in the embodiment of the present application supports multiple digital output, and fig. 2 shows a schematic circuit diagram of a 1-way high-speed isolation module therein, and the principles of the remaining channels are identical. The high-speed isolation module realizes the isolation between the input end and the post-processing circuit.
Fig. 3 is a schematic diagram showing a structure of a voltage amplifying and current driving circuit according to an embodiment of the present application. As shown in fig. 3, the optional voltage amplifying and current driving circuit includes a first circuit branch 301 and a second circuit branch 302.
The first circuit branch 301 comprises: a first resistor R1 and a second resistor R2 connected in series between the power source VCC1 and the first ground GND; the common end of the first resistor R1 and the second resistor R2 outputs a digital signal, and the common end is connected with the non-inverting input end of the first operational amplifier U1A; the inverting input end of the first operational amplifier U1A receives one output signal CH01 of the high-speed isolation module, and the output end of the first operational amplifier U1A is respectively connected with the base electrode of the first triode Q1 and the base electrode of the second triode Q2 and is connected with the emitter electrode of the first triode Q1 and the emitter electrode of the second triode Q2 after passing through a ninth resistor R9.
The common terminal of the emitter of the first transistor Q1 and the emitter of the second transistor Q2 is used as an output terminal DOCH1 of the voltage amplifying and current driving circuit.
The power supply voltage end of the first operational amplifier U1A is connected with the output end of the voltage self-adaptive circuit 103, receives VCC2 output by the voltage self-adaptive circuit 103, and the grounding end is connected with the first grounding end GND; the first capacitor C3 is connected between the power supply voltage terminal of the first operational amplifier U1A and the first ground GND.
The collector of the first triode Q1 is connected with the output end of the voltage self-adaptive circuit 103, and the collector of the second triode Q2 is connected with the second grounding end GND 1; the output of the first operational amplifier U1A is connected to the inverting input.
The second circuit branch 302 includes: a third resistor R3 and a fourth resistor R4 connected in series between the power supply VCC1 and the first ground GND; the common end of the third resistor R3 and the fourth resistor R4 outputs a digital signal, and the common end is connected with the non-inverting input end of the second operational amplifier U1B; the inverting input end of the second operational amplifier U1B receives one output signal CH02 of the high-speed isolation module; the output end of the second operational amplifier U1B is respectively connected with the base electrode of the third triode Q3, the base electrode of the fourth triode Q4, and the emitter electrode of the third triode Q3 and the emitter electrode of the fourth triode Q4 after passing through a tenth resistor R10.
The common terminal of the emitter of the third transistor Q3 and the emitter of the fourth transistor Q4 is used as an output terminal DOCH2 of the voltage amplifying and current driving circuit.
The collector of the third triode Q3 is connected with the output end of the voltage self-adaptive circuit 103, and the collector of the fourth triode Q4 is connected with the second grounding end GND 1; the output of the second operational amplifier U1B is connected to the inverting input.
In the two-circuit voltage amplifying and current driving circuit of the board card shown in fig. 3, two signals CH01 and CH02 output by the high-speed isolation circuit respectively enter the voltage comparator circuit formed by the operational amplifiers U1A and U1B. In the system, a power supply VCC1 and a high-speed isolation module are the same power supply, VCC2 is provided by a voltage self-adaptive circuit, and the two power supplies are not grounded. The selection of the operational amplifiers U1A and U1B should be noted for the following:
first point: the method has extremely high conversion rate, and can ensure that the dynamic characteristics of the signals at the output end are consistent with those of the input signals, so that the transmission delay of the board card is ensured to meet the requirements;
second point: the power supply range must be able to cover the external supply voltage, and a boost module is added after VCC2 to power the operational amplifier to offset the voltage drop between the output of the operational amplifier and the VCC2 power supply, so that the output voltage and the supply voltage remain consistent.
Third point: the op-amp bandwidth is large enough to cover the signal frequency so as not to generate distortion.
R1/R2 and R3/R4 are used as voltage dividing resistors at the non-inverting input end, reference voltage is provided for the voltage comparator, the value is moderate, and proper resistance values are selected according to the power of the resistors, the voltage VCC1 and the like.
In an alternative embodiment, a fifth resistor R5 is connected in series between the inverting input end of the first operational amplifier and the output end of one output signal CH01 of the high-speed isolation module; a sixth resistor R6 is connected in series between the inverting input end of the second operational amplifier and the output end of one output signal CH02 of the high-speed isolation module. The fifth resistor R5 and the sixth resistor R6 have the function of limiting current, so that the damage of the operational amplifier caused by overcurrent of an input signal is prevented, and the resistance value is preferably several hundred ohms to one kiloohm.
In an alternative embodiment, a second capacitor C1 and a seventh resistor R7 are connected in parallel between the inverting input terminal and the output terminal of the first operational amplifier; and a third capacitor C2 and an eighth resistor R8 are connected in parallel between the inverting input end and the output end of the second operational amplifier. R7, R8, C1 and C2 are arranged for preventing self-oscillation of the operational amplifier, and in the actual implementation process, if no self-excitation occurs during debugging, the four electronic devices are not required to be installed.
However, R9 and R10 shown in fig. 3 may be a transistor base current shunt, and the resistance values of the two resistors are preferably one hundred to several hundred ohms.
In an alternative embodiment, the first transistor Q1 and the third transistor Q3 are NPN transistors; the second triode Q2 and the fourth triode Q4 are PNP type triodes.
In an alternative embodiment, a first self-recovering fuse F1 is connected in series between the common connection of first transistor Q1, second transistor Q2, and ninth resistor R9 and the output of first circuit branch 301; a second self-recovery fuse F2 is connected in series between the common connection of the third transistor Q3, the fourth transistor Q4 and the tenth resistor R10 and the output of the second circuit branch 302.
F1 and F2 are self-restoring fuses, which disconnect the output when the output current is excessive, and automatically restore conduction when the output current returns to the normal range, thereby protecting the relevant devices.
The triodes Q1, Q2, Q3 and Q4 form a two-way push-pull output circuit, wherein the triodes Q1 and Q3 are NPN triodes, and the triodes Q2 and Q4 are PNP triodes. As shown in fig. 3, it can be seen from the analysis of the on and off conditions of the transistor: when the pin 1 of the operational amplifier is at a high level, Q1 enters a saturated conduction state, Q2 is cut off, and an output signal is at a high level; when the pin 1 of the operational amplifier is at a low level, Q1 is cut off, Q2 is saturated, and the output signal is at a low level. Therefore, the push-pull circuit can output high level and low level, and the voltages for outputting the high level and the low level are determined by external power supply, so that the voltage self-adaption function is realized. In order to ensure the output bandwidth and the wide voltage output range, the triode type selection requirement is as follows:
first point: in order to ensure the bandwidth, the triodes forming the push-pull circuit are required to be selected as geminate transistors, and the characteristic frequency is not less than 3 times of the rated bandwidth of the board card; to achieve 150M bandwidth, a triode with characteristic frequency not less than 450MHz needs to be selected;
second point: in order to ensure the output voltage range, the withstand voltage Uce of the triode pair tube is not smaller than the maximum output voltage;
third point: the load current range can be calculated according to p=u×i, and a triode with proper power is selected.
The voltage self-adaptive circuit provides self-adaptive power supply for the amplifying circuit, and has the following functions:
the action is as follows: providing an on-board isolation power supply;
the second action is: and adaptively outputting a digital voltage signal of 3.5V-60V according to the user requirement.
The high-speed isolation digital quantity output board card with the self-adaptive output voltage comprises a high-speed isolation module, a voltage amplification and current driving circuit, a voltage self-adaptive circuit and an external interface, wherein the board card can convert an internal digital quantity standard level signal, namely a digital signal, into a 3.5V-60V voltage self-adaptive digital quantity signal for output, can support an output signal with the maximum speed of 150MHz, can support the high-speed digital quantity output, has adjustable voltage output and has a larger range, and the high-speed isolation module arranged by the board card can isolate an input end from a post-stage processing circuit, so that the board card also has the function of isolation protection.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (9)
1. An output voltage adaptive high-speed isolated digital quantity output board card, characterized in that the board card comprises: the high-speed isolation module, the voltage amplification and current driving circuit, the voltage self-adaptive circuit and the external interface;
the input end of the voltage amplification and current driving circuit is respectively connected with the output end of the high-speed isolation module and the output end of the voltage self-adaptive circuit, the output end of the voltage amplification and current driving circuit is connected with the external interface, and the external interface is an input power supply of the input end of the voltage self-adaptive circuit;
the high-speed isolation module converts an input digital signal into a first voltage signal and outputs the first voltage signal; the voltage amplifying and current driving circuit receives the first voltage signal and the second voltage signal input by the voltage self-adapting circuit, processes the first voltage signal and the second voltage signal to generate a voltage self-adapting digital quantity signal and outputs the voltage self-adapting digital quantity signal to the external interface.
2. The output voltage adaptive high-speed isolated digital quantity output board card of claim 1, wherein the voltage amplifying and current driving circuit comprises a first circuit branch and a second circuit branch;
the first circuit branch includes: a first resistor R1 and a second resistor R2 connected in series between the power source VCC1 and the first ground GND; the common end of the first resistor R1 and the second resistor R2 outputs a digital signal, and the common end is connected with the non-inverting input end of the first operational amplifier U1A; the inverting input end of the first operational amplifier U1A receives one output signal CH01 of the high-speed isolation module, and the output end of the first operational amplifier U1A is respectively connected with the base electrode of the first triode Q1 and the base electrode of the second triode Q2 and is connected with the emitter electrode of the first triode Q1 and the emitter electrode of the second triode Q2 after passing through a ninth resistor R9;
the common end of the emitter of the first triode Q1 and the emitter of the second triode Q2 is used as an output end DOCH1 of the voltage amplifying and current driving circuit;
the power supply voltage end of the first operational amplifier U1A is connected with the output end of the voltage self-adaptive circuit, receives VCC2 output by the voltage self-adaptive circuit, and the grounding end is connected with the first grounding end GND; a first capacitor C3 is connected between the power supply voltage end of the first operational amplifier U1A and the first ground GND;
the collector of the first triode Q1 is connected with the output end of the voltage self-adaptive circuit, and the collector of the second triode Q2 is connected with the second grounding end GND 1; the output end of the first operational amplifier U1A is connected with the inverting input end;
the second circuit branch includes: a third resistor R3 and a fourth resistor R4 connected in series between the power supply VCC1 and the first ground GND; the common end of the third resistor R3 and the fourth resistor R4 outputs a digital signal, and the common end is connected with the non-inverting input end of the second operational amplifier U1B; the inverting input end of the second operational amplifier U1B receives one output signal CH02 of the high-speed isolation module; the output end of the second operational amplifier U1B is respectively connected with the base electrode of the third triode Q3, the base electrode of the fourth triode Q4 and the emitter electrode of the third triode Q3 and the emitter electrode of the fourth triode Q4 after passing through a tenth resistor R10;
the common end of the emitter of the third triode Q3 and the emitter of the fourth triode Q4 is used as an output end DOCH2 of the voltage amplifying and current driving circuit;
the collector of the third triode Q3 is connected with the output end of the voltage self-adaptive circuit, and the collector of the fourth triode Q4 is connected with the second grounding end GND 1; the output end of the second operational amplifier U1B is connected with the inverting input end.
3. The output voltage adaptive high-speed isolated digital quantity output board card of claim 2, wherein:
a fifth resistor R5 is connected in series between the inverting input end of the first operational amplifier U1A and the output end of one output signal CH01 of the high-speed isolation module;
and a sixth resistor R6 is connected in series between the inverting input end of the second operational amplifier U1B and the output end of one output signal CH02 of the high-speed isolation module.
4. The output voltage adaptive high-speed isolated digital quantity output board card of claim 2, wherein:
and a second capacitor C1 and a seventh resistor R7 are connected in parallel between the inverting input end and the output end of the first operational amplifier U1A.
5. The output voltage adaptive high-speed isolated digital quantity output board card of claim 2, wherein:
and a third capacitor C2 and an eighth resistor R8 are connected in parallel between the inverting input end and the output end of the second operational amplifier U1B.
6. The output voltage adaptive high-speed isolated digital quantity output board card of claim 2, wherein:
the first triode Q1 and the third triode Q3 are NPN type triodes; the second triode Q2 and the fourth triode Q4 are PNP type triodes.
7. The output voltage adaptive high-speed isolated digital quantity output board card of claim 2, wherein:
a first self-recovery fuse F1 is connected in series between the common connection end of the first triode Q1, the second triode Q2 and the ninth resistor R9 and the output end of the first circuit branch;
and a second self-recovery fuse F2 is connected in series between the common connection end of the third triode Q3, the fourth triode Q4 and the tenth resistor R10 and the output end of the second circuit branch.
8. The output voltage adaptive high-speed isolation digital quantity output board card according to claim 1, wherein the high-speed isolation module is a high-speed digital isolation chip.
9. The output voltage adaptive high-speed isolated digital quantity output board card of claim 1, wherein the voltage value of the first voltage signal is 3.5V or 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311663598.8A CN117784659A (en) | 2023-12-05 | 2023-12-05 | High-speed isolation digital quantity output board card with self-adaptive output voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311663598.8A CN117784659A (en) | 2023-12-05 | 2023-12-05 | High-speed isolation digital quantity output board card with self-adaptive output voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117784659A true CN117784659A (en) | 2024-03-29 |
Family
ID=90380694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311663598.8A Pending CN117784659A (en) | 2023-12-05 | 2023-12-05 | High-speed isolation digital quantity output board card with self-adaptive output voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117784659A (en) |
-
2023
- 2023-12-05 CN CN202311663598.8A patent/CN117784659A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20140313620A1 (en) | Voltage protection circuit | |
| Hao et al. | A novel high-altitude electromagnetic pulse (HEMP) protection circuit for RF applications | |
| US11271392B2 (en) | Protection circuit for signal processor | |
| CN117784659A (en) | High-speed isolation digital quantity output board card with self-adaptive output voltage | |
| US6377434B1 (en) | Individual secondary protection device | |
| CN102147783B (en) | Master device and slave device communication circuit | |
| EP0375998A2 (en) | Low power transient suppressor circuit | |
| CN104931996A (en) | Signal conditioning system of large-dynamic short pulses in radiation detection | |
| CN210157152U (en) | Voltage temperature drift compensation circuit of CATV signal amplifier | |
| CN112198358B (en) | Flyback converter input voltage secondary side detection circuit | |
| CN114747109B (en) | ESD protection circuit | |
| CN211908750U (en) | Isolated operational amplification circuit | |
| CN114189292A (en) | Power detection circuit, power amplifier module and radio frequency front end architecture | |
| JP2600480B2 (en) | Light receiving circuit | |
| EP0309580A1 (en) | Broadband, high speed video amplifier. | |
| CN206650837U (en) | Playback equipment powers off noise reducing circuit and playback equipment | |
| CN113419595A (en) | Digital isolator and common mode interference suppression circuit thereof | |
| CN113866491B (en) | Winding driving circuit overcurrent detection circuit and design method thereof | |
| US4563660A (en) | Noise isolation system for high-speed circuits | |
| CN220271425U (en) | Voltage sampling connecting device | |
| CN219916243U (en) | Milliamp-level current output device | |
| CN219204092U (en) | Electromagnetic compatibility protection circuit of sensor | |
| CN220438428U (en) | Topology identification signal generation circuit | |
| CN215870731U (en) | Input voltage protection circuit and electronic equipment | |
| CN211456688U (en) | Novel isolated power lightning protection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |