CN202939188U - Signal conditioning circuit - Google Patents
Signal conditioning circuit Download PDFInfo
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- CN202939188U CN202939188U CN 201220629188 CN201220629188U CN202939188U CN 202939188 U CN202939188 U CN 202939188U CN 201220629188 CN201220629188 CN 201220629188 CN 201220629188 U CN201220629188 U CN 201220629188U CN 202939188 U CN202939188 U CN 202939188U
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Abstract
The utility model discloses a signal conditioning circuit. The signal conditioning circuit comprises a pulse signal trigger circuit, a pulse signal adjusting circuit, a pulse pulse-width adjusting circuit, a first timer and two monostable multivibrators, wherein the pulse signal trigger circuit is used for generating a single-pulse signal, and is connected with an input side of the pulse signal adjusting circuit; the pulse signal adjusting circuit is used for adjusting a pulse signal received on the input side; the pulse pulse-width adjusting circuit is used for adjusting the pulse width of the pulse signal generated by the pulse signal adjusting circuit; the pulse signal adjusting circuit and the pulse pulse-width adjusting circuit are connected with an input end of the first timer; an output end of the first timer, trough a first branch circuit ad a second branch circuit, outputs adjusted pulse signals respectively; and the first branch circuit is connected with the two monostable multivibrators sequentially. According to the signal conditioning circuit, the pulse signal and the pulse pulse-width are adjusted in a method of circuit adjustment, and thus test efficiency is improved and test time is shortened. Every circuit in the embodiment can be composed of preferable components.
Description
Technical field
The utility model relates to the circuit test field, refers to especially a kind of circuit for signal conditioning.
Background technology
In the electric power transfer field, widely apply igbt (IGBT, Insulated-Gate Bipolar Transistor) device in electrical system.Adopt the equipment of IGBT device, before use, need to do a large amount of tests to its transient working process.
Common with the test of double impulse test method, and the signal generation apparatus of double impulse test adopts the test unit of programming devices such as DSP, FPGA, CPLD or single-chip microcomputer mostly.Referring to Fig. 1, write-in program in the main control chip in signal generating circuit, control whole device and produce the pulse signal for test.In test process, the pulse signal difference sometimes needed, as the frequency of pulse signal or dutycycle etc. change, can only be by revising the program in main control chip, realize adjusting the variation of frequency or the dutycycle of pulse signal.
Usually need repeatedly such adjusting in the test occasion, because modification process is loaded down with trivial details, increased test period.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of circuit for signal conditioning, to solve the above-mentioned parameter of adjusting pulse signal by software, large to solve current employing software mode adjustment workload, not easy-operating problem.
For addressing the above problem, the utility model provides a kind of circuit for signal conditioning, comprising: pulse signal trigger circuit, pulse signal Circuit tuning, pulse regulating circuit, first timer, the first one shot multivibrator and the second one shot multivibrator;
Described pulse signal trigger circuit, for generation of single pulse signal, the outgoing side of pulse signal trigger circuit connects the input side of described pulse signal Circuit tuning;
Described pulse signal Circuit tuning, the pulse signal received for adjusting self input side;
Described pulse regulating circuit, for regulating the pulsewidth of the pulse signal that described pulse signal Circuit tuning produces;
Described pulse signal Circuit tuning is connected the input end of described first timer with described pulse regulating circuit;
The output terminal of described first timer is exported respectively the pulse signal after adjustment through the first branch road, the second branch road;
Described the first branch road connects the first one shot multivibrator and the second one shot multivibrator successively, and wherein the first one shot multivibrator connects the pulse signal delay circuit, and the second one shot multivibrator connects branch road pulse signal pulse width modulation circuit.
Preferably, the end of described the first branch road, the second branch road all connects a diode.
Preferably, described the first branch road also connects the gauge tap of controlling this branch road connection or disconnecting.
Preferably, also comprise: for exporting the second timer of continuous impulse signal, its input side connects continuous impulse signal frequency regulating circuit, and its outgoing side connects the input side of described pulse signal Circuit tuning.
Preferably, described continuous impulse signal frequency regulating circuit comprises: two the first by-pass cock and the first trimmer potentiometers that electric capacity forms.
Preferably, the input side of described pulse signal Circuit tuning also connects selector switch, for switching the outgoing side that is communicated with described pulse signal trigger circuit or described second timer.
Preferably, described pulse signal Circuit tuning consists of a plurality of NAND gate circuit.
Preferably, described pulse regulating circuit comprises: two the second by-pass cock and the second trimmer potentiometers that electric capacity forms.
Preferably, described pulse signal delay circuit comprises the 3rd trimmer potentiometer; Described branch road pulse signal pulse width modulation circuit comprises the 4th trimmer potentiometer.
With respect to prior art, the utlity model has following advantage: a kind of circuit for signal conditioning of the utility model, the signal of the monopulse/dipulse after exportable pulsewidth and interval time are regulated, for on-the-spot test.Due to by mode regulating impulse signal and the pulse of circuit conditioning, improved testing efficiency, shortened the test duration.Each circuit in above-described embodiment can adopt preferred device to form.
The accompanying drawing explanation
The structural representation that Fig. 1 is prior art;
The structured flowchart that Fig. 2 is the circuit for signal conditioning in embodiment;
The circuit structure diagram that Fig. 3 is embodiment;
The single pulse signal oscillogram that Fig. 4 is the regulating circuit output in embodiment;
The dipulse signal waveforms that Fig. 5 is the regulating circuit output in embodiment;
The continuous impulse signal waveforms that Fig. 6 is the regulating circuit output in embodiment.
Embodiment
For clearly demonstrating the technical scheme in the utility model, below provide preferred embodiment and be described with reference to the accompanying drawings.
Referring to Fig. 2, the circuit for signal conditioning in embodiment comprises: pulse signal trigger circuit, pulse signal Circuit tuning, pulse regulating circuit, first timer, the first one shot multivibrator and the second one shot multivibrator;
Each circuit selects components and parts as shown in Figure 3 to form.
Described pulse signal trigger circuit, for generation of single pulse signal, the outgoing side of pulse signal trigger circuit connects the input side of described pulse signal Circuit tuning;
The pulse signal trigger circuit can be selected non-maintenance button, as the S4 in Fig. 3, for generation of the level of a variation, after two Sheffer stroke gate shapings, export; Two NAND gate circuit adopt CD4011.
Described pulse signal Circuit tuning, the pulse signal received for adjusting self input side; Specifically can, referring to Fig. 3, can select to be formed by a plurality of Sheffer stroke gates, as CD4011.
The pulse regulating circuit, for regulating the pulsewidth of the pulse signal that described pulse signal Circuit tuning produces; The second by-pass cock formed by two capacitor C 4, C6 is regulated, and also can be regulated by the second trimmer potentiometer RV2.
Described pulse signal Circuit tuning is connected the input end of described first timer U1B with described pulse regulating circuit.
The pulse signal of the output terminal of described first timer U1B after first, second branch road is exported respectively adjustment.
Described the first branch road connects the first one shot multivibrator and the second one shot multivibrator successively.Wherein the first one shot multivibrator connects the pulse signal delay circuit, as the 3rd trimmer potentiometer RV3 in Fig. 3; The second one shot multivibrator connects branch road pulse signal pulse width modulation circuit, as the 4th trimmer potentiometer RV4 in Fig. 3.
Pulse signal regulating circuit in embodiment, the signal of the monopulse/dipulse after exportable pulsewidth and interval are regulated, for on-the-spot test.Due to by mode regulating impulse signal and the pulse of circuit conditioning, improved testing efficiency, shortened the test duration.Each circuit in above-described embodiment can adopt preferred device to form.
Preferably, also comprise: the end of described first, second branch road also connects a diode; As the D1 in Fig. 3 and D2.
Preferably, also comprise: described the first branch road also connects controls the gauge tap S5 that this branch road is communicated with or disconnects.By gauge tap S5, can between output single pulse signal or dipulse signal, be switched.
Preferably, also comprise: for exporting the second timer U1A of continuous impulse signal, its input side connects continuous impulse signal frequency regulating circuit, and its outgoing side connects the input side of described pulse signal Circuit tuning.
Preferably, described continuous impulse signal frequency regulating circuit comprises: two the first by-pass cock and the first trimmer potentiometer RV1 that capacitor C 3, C5 form.
Preferably, the input side of described pulse signal Circuit tuning also connects selector switch, as the mode selection switch S3 in Fig. 3; For switching the outgoing side that is communicated with described pulse signal trigger circuit or described second timer U1A.Thereby switch between continuous impulse signal and single pulse signal, by gauge tap S5, can realize switching between monopulse/dipulse signal.
Preferably, described pulse signal Circuit tuning consists of a plurality of NAND gate circuit.
Preferably, described pulse signal delay circuit comprises the 3rd trimmer potentiometer RV3;
Described branch road pulse signal pulse width modulation circuit comprises respectively the 4th trimmer potentiometer RV4.
Preferably, first timer U1B, second timer U1A in embodiment can adopt and integrate,, also can adopt two independent timers to realize.
The above describes the composition of each circuit and the chip of selection in detail, below describes the flow process of output pulse signal in detail.
Single pulse signal production process: operator scheme selector switch S3 at first, make 3 pin and 2 pin of S3 be communicated with, then operation sheet, dipulse Signal-controlled switch S5, guarantee that current is monopulse output channel gating, now output signal " OUT " is the single pulse signal mode, as shown in Figure 4.
Non-maintenance button S4 in the start pulse signal trigger circuit, obtain a variation level, through shaping circuit U3 and pulse signal Circuit tuning U2, obtain a trigger pip and deliver to triggering pin 8 pin of first timer U1B, U1B exports a monopulse, be that signal " OUT " is monopulse, the width T1 of this pulse realizes by regulating trimmer potentiometer RV2.
Dipulse signal production process: operator scheme selector switch S3 at first, make 3 pin and 2 pin of S3 be communicated with, then operation sheet, dipulse Signal-controlled switch S5, make 3 pin and 2 pin of S5 be communicated with, current is pulse-pair output passage gating, now output signal " OUT " is the dipulse aspect, as shown in Figure 5.
Non-maintenance button S4 in the start pulse signal trigger circuit, obtain a variation level, through shaping circuit U3 and pulse signal Circuit tuning U2, obtain a trigger pip after shaping, deliver to triggering pin 8 pin of first timer U1B, 9 pin of U 1B are exported a monopulse, this pulse is divided into two branch roads, wherein the second branch road is connected with signal " OUT " by diode D1, first pulse as dipulse, the width T1 of same this pulse determines by regulating trimmer potentiometer RV2, and passes through the second branch road output; And 9 pin of U1B are delivered to 5 pin of monostalbe trigger U4A by the first branch road pulse signal.
The negative edge of 5 pin of U4A triggers the pulse signal of 6 pin outputs of the first one shot multivibrator U4A, the lasting width time of this pulse high level is determined by trimmer potentiometer RV3, the signal of the 6 pin outputs of U4A is delivered to 11 pin of the second one shot multivibrator U4B again, the negative edge of same this signal triggers the pulse signal of 10 pin outputs of the second one shot multivibrator U4B, and the lasting width time of this pulse high level is determined by trimmer potentiometer RV4.The signal of the 10 pin outputs of the second one shot multivibrator U4B is connected with signal " OUT " by diode D2 again, realized that this output signal " OUT " is for the dipulse signal, wherein trimmer potentiometer RV3 has determined the time T 2 kept between the rising edge of the negative edge of first pulse and second pulse, and RV4 has determined second pulse high level duration T3.
Continuous impulse signal production process: operator scheme selector switch S3 at first, make 1 pin and 2 pin of S3 be communicated with, then operation sheet, dipulse Signal-controlled switch S5, guarantee that current is monopulse output channel gating, now output signal " OUT " is the continuous impulse aspect, as shown in Figure 6.The frequency of this signal is determined jointly by coarse adjustment switch S 1 and trimmer potentiometer RV1, they have determined the output frequency of second timer U1A, the signal of U1A output is transferred to triggering input pin 8 pin of first timer U1B by U2, at first this signal has determined the frequency of " OUT " signal, then by regulating the dutycycle of coarse adjustment switch S 2 and trimmer potentiometer RV2 regulation output signal.Thereby obtain dipulse signal as shown in Figure 6.
For the regulating circuit of setting forth in each embodiment of the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1. a circuit for signal conditioning, is characterized in that, comprising: pulse signal trigger circuit, pulse signal Circuit tuning, pulse regulating circuit, first timer, the first one shot multivibrator and the second one shot multivibrator;
Described pulse signal trigger circuit, for generation of single pulse signal, the outgoing side of pulse signal trigger circuit connects the input side of described pulse signal Circuit tuning;
Described pulse signal Circuit tuning, the pulse signal received for adjusting self input side;
Described pulse regulating circuit, for regulating the pulsewidth of the pulse signal that described pulse signal Circuit tuning produces;
Described pulse signal Circuit tuning is connected the input end of described first timer with described pulse regulating circuit;
The output terminal of described first timer is exported respectively the pulse signal after adjustment through the first branch road, the second branch road;
Described the first branch road connects the first one shot multivibrator and the second one shot multivibrator successively, and wherein the first one shot multivibrator connects the pulse signal delay circuit, and the second one shot multivibrator connects branch road pulse signal pulse width modulation circuit.
2. circuit for signal conditioning according to claim 1, is characterized in that, the end of described the first branch road, the second branch road all connects a diode.
3. circuit for signal conditioning according to claim 1, is characterized in that, described the first branch road also connects controls the gauge tap that this branch road is communicated with or disconnects.
4. circuit for signal conditioning according to claim 1, it is characterized in that, also comprise: for exporting the second timer of continuous impulse signal, its input side connects continuous impulse signal frequency regulating circuit, and its outgoing side connects the input side of described pulse signal Circuit tuning.
5. circuit for signal conditioning according to claim 4, is characterized in that, described continuous impulse signal frequency regulating circuit comprises: two the first by-pass cock and the first trimmer potentiometers that electric capacity forms.
6. circuit for signal conditioning according to claim 4, is characterized in that, the input side of described pulse signal Circuit tuning also connects selector switch, for switching the outgoing side that is communicated with described pulse signal trigger circuit or described second timer.
7. circuit for signal conditioning according to claim 1, is characterized in that, described pulse signal Circuit tuning consists of a plurality of NAND gate circuit.
8. circuit for signal conditioning according to claim 1, is characterized in that, described pulse regulating circuit comprises: two the second by-pass cock and the second trimmer potentiometers that electric capacity forms.
9. circuit for signal conditioning according to claim 1, is characterized in that, described pulse signal delay circuit comprises the 3rd trimmer potentiometer; Described branch road pulse signal pulse width modulation circuit comprises the 4th trimmer potentiometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220629188 CN202939188U (en) | 2012-11-23 | 2012-11-23 | Signal conditioning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220629188 CN202939188U (en) | 2012-11-23 | 2012-11-23 | Signal conditioning circuit |
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| CN202939188U true CN202939188U (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220629188 Expired - Fee Related CN202939188U (en) | 2012-11-23 | 2012-11-23 | Signal conditioning circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093492A (en) * | 2016-06-22 | 2016-11-09 | 北京铭峰科技有限公司 | A kind of pulse signal generation method of CS115 test be applicable to GJB151B 2013 |
| CN106773969A (en) * | 2016-12-23 | 2017-05-31 | 芜湖国睿兆伏电子有限公司 | A kind of Multi-path synchronous trigger control circuit |
| CN107834999A (en) * | 2017-12-24 | 2018-03-23 | 山西工程技术学院 | Pulse and continuous impulse generator based on Schmitt trigger |
| CN109547120A (en) * | 2018-12-29 | 2019-03-29 | 杰华特微电子（杭州）有限公司 | Method for transmitting signals, transmission control circuit and the Switching Power Supply using it |
| CN109547120B (en) * | 2018-12-29 | 2024-05-24 | 杰华特微电子股份有限公司 | Signal transmission method, transmission control circuit and switching power supply using same |
-
2012
- 2012-11-23 CN CN 201220629188 patent/CN202939188U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093492A (en) * | 2016-06-22 | 2016-11-09 | 北京铭峰科技有限公司 | A kind of pulse signal generation method of CS115 test be applicable to GJB151B 2013 |
| CN106773969A (en) * | 2016-12-23 | 2017-05-31 | 芜湖国睿兆伏电子有限公司 | A kind of Multi-path synchronous trigger control circuit |
| CN107834999A (en) * | 2017-12-24 | 2018-03-23 | 山西工程技术学院 | Pulse and continuous impulse generator based on Schmitt trigger |
| CN107834999B (en) * | 2017-12-24 | 2023-12-22 | 山西工程技术学院 | Single pulse and continuous pulse generator based on Schmitt trigger |
| CN109547120A (en) * | 2018-12-29 | 2019-03-29 | 杰华特微电子（杭州）有限公司 | Method for transmitting signals, transmission control circuit and the Switching Power Supply using it |
| CN109547120B (en) * | 2018-12-29 | 2024-05-24 | 杰华特微电子股份有限公司 | Signal transmission method, transmission control circuit and switching power supply using same |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20211123 |