CN110166027B - High-voltage pulse signal generating device and method - Google Patents
High-voltage pulse signal generating device and method Download PDFInfo
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- CN110166027B CN110166027B CN201910360408.2A CN201910360408A CN110166027B CN 110166027 B CN110166027 B CN 110166027B CN 201910360408 A CN201910360408 A CN 201910360408A CN 110166027 B CN110166027 B CN 110166027B
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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
- H03K3/011—Modifications of generator to compensate for variations in physical values, e.g. voltage, temperature
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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
- H03K3/353—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of field-effect transistors with internal or external positive feedback
Abstract
The invention provides a high-voltage pulse signal generating device and a method, comprising the following modules: the signal input module is used for converting the input low-voltage modulation signal into a first pulse signal and outputting the first pulse signal; the voltage regulating module is used for increasing the input first input voltage to a first preset voltage and outputting the first preset voltage; the input end of the circuit switching module is respectively connected with the output end of the signal input module and the output end of the voltage regulating module, and is used for generating a high-voltage pulse signal based on the first pulse signal and the first preset voltage; and the impedance matching module is connected to the output end of the circuit switching module and used for absorbing echo. According to the high-voltage pulse signal generating device and method, the high-voltage pulse signal suitable for the fields of terahertz time-domain spectroscopy systems or piezoelectric material research and the like is generated through reasonable collocation and arrangement of the modules.
Description
Technical Field
The invention belongs to the field of high-voltage pulse signals, and particularly relates to a high-voltage pulse signal generating device and method.
Background
At present, high-voltage pulse signals are required to be used as signals in the fields of terahertz time-domain spectroscopy systems, piezoelectric material research and the like. Most of the existing schemes are built by using discrete mos tubes, and the high-voltage power supply adopts two-stage boosting treatment, so that the mos tubes are difficult to accurately and consistently achieve parameters, the driving processes of the mos tubes are different, and the rising edge and the falling edge of a signal are asymmetric. Because the mos tube has a node capacitance, the slope of the output signal is higher than 200ns, the load and the output impedance are not matched to form a reflected wave, signal interference can be generated, the waveform needs to be corrected, and the efficiency is not high enough.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a high-voltage pulse signal generating device and method for solving the problem of unsuitable high-voltage pulse signal generated in the prior art.
To achieve the above and other related objects, the present invention provides a high voltage pulse signal generating apparatus and method, the apparatus comprising: the signal input module is used for converting the input low-voltage modulation signal into a first pulse signal and outputting the first pulse signal; the voltage regulating module is used for increasing the input first input voltage to a first preset voltage and outputting the first preset voltage; the input end of the circuit switching module is respectively connected with the output end of the signal input module and the output end of the voltage regulating module, and is used for generating a high-voltage pulse signal based on the first pulse signal and the first preset voltage; and the impedance matching module is connected to the output end of the circuit switching module and used for absorbing echo.
In an embodiment of the invention, the signal input module includes a pulse switching circuit and an optocoupler circuit; the pulse switching circuit is used for converting the low-voltage modulation signal into a low-voltage pulse signal; the optical coupling circuit is connected with the pulse switching circuit and used for converting the low-voltage pulse signal into a first pulse signal.
In an embodiment of the invention, the pulse switching circuit is a CFD circuit.
In an embodiment of the invention, the low voltage modulation signal is a square wave signal of 0 to 5V, and the first pulse signal is a pulse signal of 12V.
In an embodiment of the present invention, the first input voltage is 12V, and the first preset voltage is 100V.
In an embodiment of the invention, the voltage regulation module includes a sepic circuit.
In an embodiment of the invention, the impedance matching module includes a pi-type matching circuit.
In an embodiment of the invention, the high voltage pulse signal is a 100V pulse signal.
In one embodiment of the present invention, the circuit switching module includes a first buffer, a charge pump, a selection switch, an inverter, a first pmos transistor and a second pmos transistor; the input ends of the first buffer and the reverser are respectively connected with the output end of the signal input module; the first end of the charge pump is connected with the first buffer, and the second end of the charge pump is connected with the source electrode of the first pmos tube; the selection switch is a two-gear selection switch and comprises a public end, a first end and a second end, wherein the public end of the selection switch is connected with the first end of the charge pump; the first end of the selection switch is connected with the input end of the voltage regulating module; the second end of the selection switch is connected with the grid electrode of the first pmos tube; the public end of the selection switch is connected with the first port of the selection switch when the first pulse signal is a low-level signal; the public end of the selection switch is connected with the second port of the selection switch when the first pulse signal is a high-level signal; the drain electrode of the first pmos transistor is connected with the output end of the voltage regulating module; the source electrode of the first pmos transistor is connected with the drain electrode of the second pmos transistor, and the source electrode of the first pmos transistor and the drain electrode of the second pmos transistor are connected with the second end of the charge pump; the source electrode of the second pmos tube is grounded; the output end of the inverter is connected with the grid electrode of the second pmos tube.
In order to achieve the above purpose, the present invention further provides an optical module aging test method, which includes the following steps: the signal input module converts the input low-voltage modulation signal into a first pulse signal and outputs the first pulse signal to the circuit switching module; the voltage regulating module increases the input first input voltage to a first preset voltage and outputs the first preset voltage to the circuit switching module; the circuit switching module generates a high-voltage pulse signal based on the first pulse signal, the first input voltage and the first preset voltage; the impedance matching module absorbs the echo generated by the circuit switching module.
As described above, the high-voltage pulse signal generating device and method of the present invention have the following advantages:
waveform correction is carried out on the low-voltage modulation signal based on the pulse switching circuit and the optocoupler circuit; providing a suitable first preset voltage based on the voltage regulating module to improve efficiency; the echo is absorbed based on the impedance matching module.
Drawings
Fig. 1 is a schematic diagram of a high-voltage pulse signal generating device according to an embodiment of the invention.
Fig. 2 is a flow chart of a high voltage pulse signal generating method according to an embodiment of the invention.
Description of element reference numerals
1. Signal input module
11. Pulse switching circuit
12. Optocoupler circuit
Y-delay device
B comparator
H2 Second buffer
2. Voltage regulating module
3. Circuit switching module
H1 First buffer
F reverser
K1 First end of charge pump
K2 Input terminal of voltage regulating module
K3 Grid electrode of first pmos tube
P1 first pmos tube
P2 second pmos tube
D charge pump
4. Impedance matching module
S201 to S204 steps
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
The invention relates to a high-voltage pulse signal generating device and a method, which are used for carrying out waveform correction on a low-voltage modulation signal based on a pulse switching circuit and an optical coupling circuit; providing a suitable first preset voltage based on the voltage regulating module to improve efficiency; the echo is absorbed based on the impedance matching module.
As shown in fig. 1, in one embodiment, the high voltage pulse signal generating apparatus of the present invention includes: the method comprises the following modules: the signal input module 1 is used for converting an input low-voltage modulation signal into a first pulse signal and outputting the first pulse signal; a voltage regulating module 2 for raising the input first input voltage to a first preset voltage and outputting the first preset voltage; the input end of the circuit switching module 3 is respectively connected with the output end of the signal input module 1 and the output end of the voltage regulating module 2, and is used for generating a high-voltage pulse signal based on the first pulse signal and the first preset voltage; and the impedance matching module 4 is connected to the output end of the circuit switching module 3 and is used for absorbing echo. The high-voltage pulse signals suitable for the fields of terahertz time-domain spectroscopy systems or piezoelectric material research and the like are generated through reasonable collocation and arrangement of the modules.
In one embodiment, the signal input module 1 includes a pulse switching circuit 11 and an optocoupler circuit 12; the pulse switching circuit 11 is used for converting the low-voltage modulation signal into a low-voltage pulse signal; the optocoupler circuit 12 is connected to the pulse switching circuit 11 and is configured to convert the low-voltage pulse signal into a first pulse signal. The pulse switching circuit 11 comprises a delayer Y and a comparator B, the low-voltage modulation signal input by the input end of the signal input module 1 is a square wave signal of 0 to 5V and is divided into two paths of signals, the first path of signal is delayed by the delayer Y and is transmitted to the comparator B, the second path of signal is directly transmitted to the comparator B, and the two paths of signals generate the low-voltage pulse signal through the comparator B. The optocoupler 12 is an optocoupler (optical coupler equipment, abbreviated OCEP) and also called an optoisolator or optocoupler, abbreviated optocoupler. It is a device for transmitting electric signals by using light as medium, and usually a light emitter (infrared light emitting diode LED) and a light receiver (photo-sensitive semiconductor tube, photo-resistor) are packaged in the same package. When the input end is powered on, the light emitter emits light, and the light receiver receives the light to generate photocurrent, and the photocurrent flows out of the output end, so that 'electric-optical-electric' conversion is realized. The photoelectric coupler using light as medium to couple the signal of input end to output end has the advantages of small volume, long service life, no contact, strong anti-interference capability, insulation between output and input, unidirectional signal transmission, etc. and can be widely used in digital circuits. The optocoupler circuit 12 is connected to the pulse switching circuit 11 and is configured to convert the low-voltage pulse signal into a first pulse signal. Specifically, the first pulse signal is a pulse signal of 12V.
In an embodiment, the signal input module 1 includes a second buffer H2, where the second buffer H2 is connected to the optocoupler 12, and is configured to directly output a first pulse signal, and is used in a circuit system that advances the first pulse signal to a higher stage, i.e. the circuit switching module 3.
In one embodiment, the pulse switching circuit 11 is a CFD circuit. The constant ratio phase detector CFD is a novel phase detector capable of being used at high frequency (more than 100 MHz), and is different from the conventional phase detector in that the phase difference between the output and the input of the CFD is not changed by the change of the magnitude of the input. Specifically, the CFD circuit compares the 0 point to generate a pulse switching circuit 11, so that the output slope can reach 5ns, and the speed can be increased and the jitter can be eliminated.
In one embodiment, the voltage adjusting module 2 is configured to boost the input first input voltage to a first preset voltage and output the first preset voltage. The first input voltage of the voltage regulating module 2 is 12V, and the first preset voltage is 100V. Specifically, the voltage regulation module 2 includes a sepic circuit, and Sepic (Single ended primary inductor converter) is a single-ended primary-side inductive converter, which is a DCDC converter that allows an output voltage to be greater than, less than, or equal to an input voltage. The output voltage is controlled by the duty cycle of the master switch (triode or MOS tube). The greatest benefit of this circuit is the input-output polarity. Another benefit is isolation of the input and output, which is achieved by the capacitance Cs on the main loop. Meanwhile, the switching tube has a complete turn-off function, and when the switching tube is turned off, the output voltage is 0V. The boost principle of the sepic circuit is adopted, so that the inductance area can be reduced, and the efficiency is improved. The first input voltage 12V is boosted to a first preset voltage 100V in the voltage regulation module 2, with a maximum current of 30mA, generating a 3W high voltage source with ripple as low as 200mV.
In one embodiment, the circuit switching module 3 includes a first buffer H1, a charge pump D, an inverter F, a first pmos transistor P1 and a second pmos transistor P2; the input ends of the first buffer H1 and the inverter F are respectively connected with the output end of the signal input module 1, and a first pulse signal output by the output end of the signal input module 1 is respectively transmitted to the first buffer H1 and the inverter F; the output end of the first buffer H1 is a control end; the first end of the charge pump D is connected with the input end of the voltage regulating module 2 or the grid electrode of the first pmos tube P1 under the control of the control end; when the first pulse signal is a low-level signal, the control end controls the first end K1 of the charge pump to be connected with the input end K2 of the voltage regulating module 2; when the first pulse signal is a high-level signal, the control end controls the first end K1 of the charge pump to be connected with the grid electrode K3 of the first pmos transistor; the second end of the charge pump D is connected with the source electrode of the first pmos transistor P1; the drain electrode of the first pmos transistor P1 is connected with the output end of the voltage regulating module 2; the source electrode of the first pmos transistor P1 is connected to the drain electrode of the second pmos transistor P2, and the source electrode of the first pmos transistor P1 and the drain electrode of the second pmos transistor P2 are connected to the second end of the charge pump D; the source electrode of the second pmos transistor P2 is grounded; the output end of the inverter F is connected with the grid electrode of the second pmos tube P2. Specifically, when the first pulse signal is a low level signal, the first end K1 of the charge pump is connected to the input end K2 of the voltage adjustment module 2, and is charged to 12V at this time, and when the first pulse signal is a low level signal, a high level signal is output to the gate of the second pmos transistor P2 through the inverter F, and then the second pmos transistor P2 is turned on, and the drain of the second pmos transistor P2 outputs a low level pulse signal of 0V to the impedance matching module 4. When the first pulse signal is a high level signal, a low level signal is output to the gate of the second pmos transistor P2 through the inverter F, and the second pmos transistor P2 is not turned on at this time. The first end K1 of the charge pump is connected with a grid K3 port of the first pmos transistor when the first pulse signal is a high-level signal; at this time, a high level signal is input to the gate K3 of the first pmos transistor P1, the drain of the first pmos transistor P1 is connected to the output end of the voltage adjusting module 2, and the first preset voltage is specifically 100V, at this time, the first pmos transistor P1 is turned on, and the source of the first pmos transistor P1 outputs a high level pulse signal of 100V to the impedance matching module 4. So that a high voltage pulse signal is output at the output of the circuit switching module 3 based on the first pulse signal and the first preset voltage input at the input of the circuit switching module 3. Specifically, the high-voltage pulse signal is a 100V pulse signal. Thus, a high-voltage pulse signal with symmetrical high-voltage output and fast slope is generated.
In one embodiment, the first pmos transistor P1 and the second pmos transistor P2 have an internal resistance of 3 ohms and an input capacitance of 75pF.
In one embodiment, the impedance matching module 4 includes a pi-type matching circuit. The pi-type matching circuit is used for absorbing echoes.
As shown in fig. 2, in an embodiment, the present invention further provides an optical module aging testing method, which includes the following steps:
step 201, the signal input module converts the input low-voltage modulation signal into a first pulse signal and outputs the first pulse signal to the circuit switching module.
The signal input module is connected with the circuit switching module and used for converting the input low-voltage modulation signal into a first pulse signal and outputting the first pulse signal to the circuit switching module.
Step S202, the voltage regulating module increases the input first input voltage to a first preset voltage and outputs the first preset voltage to the circuit switching module.
The voltage regulating module is connected to the circuit switching module and used for increasing the input first input voltage to a first preset voltage and outputting the first preset voltage to the circuit switching module.
Step S203, the circuit switching module generates a high voltage pulse signal based on the first pulse signal, the first input voltage and the first preset voltage.
The input end of the circuit switching module is respectively connected with the output end of the signal input module and the output end of the voltage regulating module, and the circuit switching module is used for generating a high-voltage pulse signal based on the first pulse signal, the first input voltage and the first preset voltage.
And S204, the impedance matching module absorbs the echo generated by the circuit switching module.
The impedance matching module is connected to the output end of the circuit switching module and used for absorbing echoes generated by the circuit switching module.
The protection scope of the optical module aging test method is not limited to the execution sequence of the steps listed in the embodiment, and all the schemes of step increase and decrease and step replacement in the prior art according to the principles of the invention are included in the protection scope of the invention.
In summary, the high-voltage pulse signal generating device and method of the invention have the following advantages: waveform correction is carried out on the low-voltage modulation signal based on the pulse switching circuit and the optocoupler circuit; providing a suitable first preset voltage based on the voltage regulating module to improve efficiency; the echo is absorbed based on the impedance matching module.
Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A high voltage pulse signal generating device, comprising the following modules:
the signal input module is used for converting the input low-voltage modulation signal into a first pulse signal and outputting the first pulse signal;
the voltage regulating module is used for increasing the input first input voltage to a first preset voltage and outputting the first preset voltage;
the input end of the circuit switching module is respectively connected with the output end of the signal input module and the output end of the voltage regulating module, and is used for generating a high-voltage pulse signal based on the first pulse signal and the first preset voltage;
the circuit switching module comprises a first pmos tube; when the first pulse signal is a high-level signal, the first pmos transistor is started, and the high-level signal and the first preset voltage are input to the first pmos transistor so that the first pmos transistor generates a high-voltage pulse signal;
and the impedance matching module is connected to the output end of the circuit switching module and used for absorbing echo.
2. The high voltage pulse signal generating apparatus according to claim 1, wherein the signal input module comprises a pulse switching circuit and an optocoupler circuit;
the pulse switching circuit is used for converting the low-voltage modulation signal into a low-voltage pulse signal;
the optical coupling circuit is connected with the pulse switching circuit and used for converting the low-voltage pulse signal into a first pulse signal.
3. The high voltage pulse signal generating apparatus according to claim 2, wherein the pulse switching circuit is a CFD circuit.
4. The high voltage pulse signal generating apparatus according to claim 1, wherein the low voltage modulation signal is a square wave signal of 0 to 5V, and the first pulse signal is a pulse signal of 12V.
5. The high voltage pulse signal generating apparatus according to claim 1, wherein the first input voltage is 12V and the first preset voltage is 100V.
6. The high voltage pulse signal generating apparatus of claim 1, wherein the voltage regulating module comprises a sepic circuit.
7. The high voltage pulse signal generating apparatus according to claim 1, wherein the impedance matching module comprises a pi-type matching circuit.
8. The high-voltage pulse signal generating apparatus according to claim 1, wherein the high-voltage pulse signal is a 100V pulse signal.
9. The high voltage pulse signal generating apparatus according to claim 1, wherein the circuit switching module comprises a first buffer, a charge pump, an inverter, and a second pmos transistor;
the input ends of the first buffer and the reverser are respectively connected with the output end of the signal input module;
the output end of the first buffer is a control end;
the first end of the charge pump is connected with the input end of the voltage regulating module or the grid electrode of the first pmos tube under the control of the control end; when the first pulse signal is a low-level signal, the control end controls the first end of the charge pump to be connected with the input end of the voltage regulating module; when the first pulse signal is a high-level signal, the control end controls the first end of the charge pump to be connected with the grid electrode of the first pmos tube;
the drain electrode of the first pmos transistor is connected with the output end of the voltage regulating module;
the source electrode of the first pmos transistor is connected with the drain electrode of the second pmos transistor, and the source electrode of the first pmos transistor and the drain electrode of the second pmos transistor are connected with the second end of the charge pump;
the source electrode of the second pmos tube is grounded;
the output end of the inverter is connected with the grid electrode of the second pmos tube.
10. An optical module aging test method based on the high-voltage pulse signal generating device according to any one of claims 1 to 9, characterized by comprising the steps of:
the signal input module converts the input low-voltage modulation signal into a first pulse signal and outputs the first pulse signal to the circuit switching module;
the voltage regulating module increases the input first input voltage to a first preset voltage and outputs the first preset voltage to the circuit switching module;
the circuit switching module generates a high-voltage pulse signal based on the first pulse signal, the first input voltage and the first preset voltage;
the circuit switching module comprises a first pmos tube; when the first pulse signal is a high-level signal, the first pmos transistor is started, and the high-level signal and the first preset voltage are input to the first pmos transistor so that the first pmos transistor generates a high-voltage pulse signal;
the impedance matching module absorbs the echo generated by the circuit switching module.
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| TW201024739A (en) * | 2008-10-30 | 2010-07-01 | Verigy Pte Ltd Singapore | Test arrangement, pogo-pin and method for testing a device under test |
| CN104199500A (en) * | 2014-07-31 | 2014-12-10 | 青岛歌尔声学科技有限公司 | High voltage generating circuit and method, power source control circuit and electronic system |
| CN104734554A (en) * | 2015-01-19 | 2015-06-24 | 张湘杰 | Power source supercharger and power supply device |
| CN105763173A (en) * | 2016-02-18 | 2016-07-13 | 广东宝莱特医用科技股份有限公司 | Electrical pulse generating apparatus |
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|---|---|---|---|---|
| TW201024739A (en) * | 2008-10-30 | 2010-07-01 | Verigy Pte Ltd Singapore | Test arrangement, pogo-pin and method for testing a device under test |
| CN104199500A (en) * | 2014-07-31 | 2014-12-10 | 青岛歌尔声学科技有限公司 | High voltage generating circuit and method, power source control circuit and electronic system |
| CN104734554A (en) * | 2015-01-19 | 2015-06-24 | 张湘杰 | Power source supercharger and power supply device |
| CN105763173A (en) * | 2016-02-18 | 2016-07-13 | 广东宝莱特医用科技股份有限公司 | Electrical pulse generating apparatus |
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