CN104901655A - Signal generator - Google Patents
Signal generator Download PDFInfo
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- CN104901655A CN104901655A CN201510333394.7A CN201510333394A CN104901655A CN 104901655 A CN104901655 A CN 104901655A CN 201510333394 A CN201510333394 A CN 201510333394A CN 104901655 A CN104901655 A CN 104901655A
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- inverter
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Abstract
The invention provides a signal generator, comprising a current input circuit, an input control circuit, a self-oscillation circuit and an output circuit. The current input circuit comprises a field-effect tube, a third triode, a second triode, a first resistor, a second resistor and a third resistor; the input control circuit comprises a shutdown switch, a first capacitor, a first variable resistor, a first phase inverter, a second capacitor, a fourth resistor and a third triode; the self-oscillation circuit comprises a third capacitor, a second phase inverter, a first diode, a second diode, a second variable resistor and a third variable resistor; the output circuit comprises a third phase inverter, a fourth phase inverter and a fifth resistor. The current input circuit, the input control circuit, the self-oscillation circuit and the output circuit are connected in turn. The signal generator of the invention could avoid ohmic loss brought by inductive reactance.
Description
Technical field
The present invention relates to signal source technical field, particularly relate to a kind of signal generator.
Background technology
Signal generator is a kind of equipment that can provide various frequency, waveform and the output signal of telecommunication.When measuring the amplitude response of various electronic system or electronic equipment, frequency characteristic, transmission characteristic and other electrical quantity, and the characteristic measuring components and parts with parameter time, be used as the signal source of testing or driving source.
At present, existing signal generator major part can only produce simple signal, although the signal generator of only a few can realize double frequency or three frequently signals, the pulse number of these signals, the forward of pulse, negative sense width all can not independent regulation, thus bring inconvenience.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of signal generator, can carry out independent regulation to the pulse number of output signal, the forward of pulse, negative sense width.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of signal generator, comprise current input circuit, input control circuit, self-maintained circuit and output circuit, described current input circuit comprises field effect transistor, the first triode, the second triode, the first resistance, the second resistance and the 3rd resistance, described input control circuit comprises disconnect, the first electric capacity, the first variable resistor, the first inverter, the second electric capacity, the 4th resistance and the 3rd triode, described self-maintained circuit comprises the 3rd electric capacity, the second inverter, the first diode, the second diode, the second adjustable resistance and the 3rd variable resistor, described output circuit comprises the 3rd inverter, the 4th inverter and the 5th resistance, the drain electrode of described field effect transistor is connected power end with the collector electrode of described first triode, the source electrode of described field effect transistor connects the collector electrode of described second triode by described first resistance, the grid of described field effect transistor connects the collector electrode of described second triode, the grounded emitter of described second triode, the base stage of described first triode connects the source electrode of described field effect transistor, the emitter of described first triode is connected the base stage of described second triode by described second resistance and is connected described disconnect by described 3rd resistance, described disconnect connects the input of described first inverter by described first electric capacity, between the input that described first variable resistor is connected to described first inverter and ground, the output of described first inverter is connected the base stage of described 3rd triode with described second electric capacity by described 4th resistance in parallel, the collector electrode of described 3rd triode connects the input of described second inverter, the grounded emitter of described 3rd triode, between the input that described 3rd electric capacity is connected to described second inverter and ground, the anode of described first diode is connected the input of described second inverter with the negative electrode of described second diode, described the second adjustable resistance is connected between the negative electrode of described first diode and the output of described second inverter, described 3rd variable resistor is connected between the anode of described second diode and the output of described second inverter, the output of described second inverter connects the input of described 3rd inverter and described 4th inverter, described 3rd inverter is connected one end of described 5th resistance with the output of described 4th inverter, the other end of described 5th resistance is as output.
Be different from the situation of prior art, the invention has the beneficial effects as follows: when current input circuit generation input signal causes self-maintained circuit to vibrate, input control circuit can control inputs signal, thus pulse number to output signal can be realized, the forward of pulse, negative sense width carry out independent regulation.
Accompanying drawing explanation
Fig. 1 is the principle schematic of embodiment of the present invention signal generator.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See Fig. 1, it is the principle schematic of embodiment of the present invention signal generator.The signal generator of the present embodiment comprises current input circuit, input control circuit, self-maintained circuit and output circuit.Current input circuit comprises field effect transistor M, the first triode Q1, the second triode Q2, the first resistance R1, the second resistance R2 and the 3rd resistance R3.Input control circuit comprises disconnect S, the first electric capacity C1, the first variable resistor R4, the first inverter U1, the second electric capacity C2, the 4th resistance R5 and the 3rd triode Q3.Self-maintained circuit comprises the 3rd electric capacity C3, the second inverter U2, the first diode D1, the second diode D2, the second adjustable resistance R6 and the 3rd variable resistor R7.Output circuit comprises the 3rd inverter U3, the 4th inverter U4 and the 5th resistance R8.
The drain electrode of field effect transistor M is connected power end Vcc with the collector electrode of the first triode Q1, the source electrode of field effect transistor M connects the collector electrode of the second triode Q2 by the first resistance R1, the grid of field effect transistor M connects the collector electrode of the second triode Q2, the grounded emitter of the second triode Q2, the base stage of the first triode Q1 connects the source electrode of field effect transistor M, the emitter of the first triode Q1 connects the base stage of the second triode Q2 by the second resistance R2 and connects disconnect S by the 3rd resistance R3, disconnect S connects the input of the first inverter U1 by the first electric capacity C1, between the input that first variable resistor R4 is connected to the first inverter U1 and ground, the output of the first inverter U1 is connected the base stage of the 3rd triode Q3 with the second electric capacity C2 by the 4th resistance R5 in parallel, the collector electrode of the 3rd triode Q3 connects the input of the second inverter U2, the grounded emitter of the 3rd triode Q3, between the input that 3rd electric capacity C3 is connected to the second inverter U2 and ground, the anode of the first diode D1 is connected the input of the second inverter U2 with the negative electrode of the second diode D2, the second adjustable resistance R6 is connected between the negative electrode of the first diode D1 and the output of the second inverter U2, 3rd variable resistor R7 is connected between the anode of the second diode D2 and the output of the second inverter U2, the output of the second inverter U2 connects the input of the 3rd inverter U3 and the 4th inverter U4, 3rd inverter U3 is connected one end of the 5th resistance R8 with the output of the 4th inverter U4, the other end of the 5th resistance R8 is as output.
Wherein, the signal generator of the present embodiment operationally, field effect transistor M receives power source voltage Vcc, and in the base stage of the first triode Q1, export the first electric current according to this voltage, first resistance R1 exports the second electric current to the second triode Q2, first resistance R1 is in order to set the size of input current, the first triode Q1 is triggered by the first electric current, and pass through the action of the first triode Q1, the second resistance R2, the 3rd resistance R3 and the second triode Q2, export this input current to disconnect S, this input current is as the input signal of self-maintained circuit.
Before disconnect S is closed, the 3rd triode Q3 conducting, the 3rd electric capacity C3 is shorted, self-maintained circuit failure of oscillation, and now the 5th resistance R8 no signal exports; After disconnect S is closed, the signal upset that the first inverter U1 exports is for low, and the 3rd triode Q3 turns off, self-maintained circuit starting of oscillation, and now the 5th resistance R8 outputs signal.
By the charge constant regulating the resistance of the first variable resistor R4 to change the first electric capacity C1, and then control the turn-off time of the 3rd triode Q3, just can reach the cycle of oscillation controlling self-maintained circuit, that is to say the pulse number of output signal.The second adjustable resistance R6, the second adjustable resistance R7 and the first diode D1, the second diode D2 form the control circuit to the charge and discharge time of the second electric capacity C2, the resistance of the second adjustable resistance R6 and the second adjustable resistance R7 can regulate according to actual needs, to adjust the charge and discharge time of the second electric capacity C2 respectively, namely adjust service time and the turn-off time of output signal, the forward, the negative sense width that realize the pulse to output signal carry out independent regulation.
The signal generator of the embodiment of the present invention produces input signal by current input circuit, when causing self-maintained circuit to vibrate by input signal, input control circuit can control inputs signal, thus pulse number to output signal can be realized, the forward of pulse, negative sense width carry out independent regulation.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (1)
1. a signal generator, it is characterized in that, comprise current input circuit, input control circuit, self-maintained circuit and output circuit, described current input circuit comprises field effect transistor, the first triode, the second triode, the first resistance, the second resistance and the 3rd resistance; Described input control circuit comprises disconnect, the first electric capacity, the first variable resistor, the first inverter, the second electric capacity, the 4th resistance and the 3rd triode; Described self-maintained circuit comprises the 3rd electric capacity, the second inverter, the first diode, the second diode, the second adjustable resistance and the 3rd variable resistor; Described output circuit comprises the 3rd inverter, the 4th inverter and the 5th resistance;
The drain electrode of described field effect transistor is connected power end with the collector electrode of described first triode, the source electrode of described field effect transistor connects the collector electrode of described second triode by described first resistance, the grid of described field effect transistor connects the collector electrode of described second triode, the grounded emitter of described second triode, the base stage of described first triode connects the source electrode of described field effect transistor, the emitter of described first triode is connected the base stage of described second triode by described second resistance and is connected described disconnect by described 3rd resistance, described disconnect connects the input of described first inverter by described first electric capacity, between the input that described first variable resistor is connected to described first inverter and ground, the output of described first inverter is connected the base stage of described 3rd triode with described second electric capacity by described 4th resistance in parallel, the collector electrode of described 3rd triode connects the input of described second inverter, the grounded emitter of described 3rd triode, between the input that described 3rd electric capacity is connected to described second inverter and ground, the anode of described first diode is connected the input of described second inverter with the negative electrode of described second diode, described the second adjustable resistance is connected between the negative electrode of described first diode and the output of described second inverter, described 3rd variable resistor is connected between the anode of described second diode and the output of described second inverter, the output of described second inverter connects the input of described 3rd inverter and described 4th inverter, described 3rd inverter is connected one end of described 5th resistance with the output of described 4th inverter, the other end of described 5th resistance is as output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510333394.7A CN104901655A (en) | 2015-06-16 | 2015-06-16 | Signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510333394.7A CN104901655A (en) | 2015-06-16 | 2015-06-16 | Signal generator |
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| Publication Number | Publication Date |
|---|---|
| CN104901655A true CN104901655A (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510333394.7A Pending CN104901655A (en) | 2015-06-16 | 2015-06-16 | Signal generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300007A (en) * | 2016-10-13 | 2017-01-04 | 华北电力大学（保定） | The drive circuit for laser that the output of a kind of frequency power is stable |
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|---|---|---|---|---|
| US20060103481A1 (en) * | 2004-11-12 | 2006-05-18 | Hon Hai Precision Industry Co., Ltd. | Clock signal generator |
| CN202713251U (en) * | 2012-07-05 | 2013-01-30 | 深圳市蓝海华腾技术有限公司 | Controllable square-wave signal generator |
| CN103427795A (en) * | 2013-08-12 | 2013-12-04 | 中国航天科技集团公司第九研究院第七七一研究所 | Matrix pulse signal generation circuit and generation method |
| CN103746673A (en) * | 2013-12-18 | 2014-04-23 | 陕西海泰电子有限责任公司 | Pulse signal generator |
| CN204633731U (en) * | 2015-06-16 | 2015-09-09 | 成都宜川电子科技有限公司 | Signal generator |
-
2015
- 2015-06-16 CN CN201510333394.7A patent/CN104901655A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060103481A1 (en) * | 2004-11-12 | 2006-05-18 | Hon Hai Precision Industry Co., Ltd. | Clock signal generator |
| CN202713251U (en) * | 2012-07-05 | 2013-01-30 | 深圳市蓝海华腾技术有限公司 | Controllable square-wave signal generator |
| CN103427795A (en) * | 2013-08-12 | 2013-12-04 | 中国航天科技集团公司第九研究院第七七一研究所 | Matrix pulse signal generation circuit and generation method |
| CN103746673A (en) * | 2013-12-18 | 2014-04-23 | 陕西海泰电子有限责任公司 | Pulse signal generator |
| CN204633731U (en) * | 2015-06-16 | 2015-09-09 | 成都宜川电子科技有限公司 | Signal generator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300007A (en) * | 2016-10-13 | 2017-01-04 | 华北电力大学（保定） | The drive circuit for laser that the output of a kind of frequency power is stable |
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Application publication date: 20150909 |
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