CN204633731U - Signal generator - Google Patents
Signal generator Download PDFInfo
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- CN204633731U CN204633731U CN201520416875.XU CN201520416875U CN204633731U CN 204633731 U CN204633731 U CN 204633731U CN 201520416875 U CN201520416875 U CN 201520416875U CN 204633731 U CN204633731 U CN 204633731U
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Abstract
The utility model provides a kind of signal generator.It comprises current input circuit, input control circuit, self-maintained circuit and output circuit. and current input circuit comprises field effect transistor, the first triode, the second triode, the first resistance, the second resistance and the 3rd resistance; 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; 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; Output circuit comprises the 3rd inverter, the 4th inverter and the 5th resistance.Current input circuit, input control circuit, self-maintained circuit are connected successively with output circuit.The utility model can be avoided producing the ohmic loss caused by induction reactance.
Description
Technical field
The utility model relates to signal source technical field, particularly relates 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.
Utility model content
The technical problem that the utility model 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 utility model 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 beneficial effects of the utility model are: 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 the utility model embodiment signal generator.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
See Fig. 1, it is the principle schematic of the utility model embodiment 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 utility model embodiment 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 embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification 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 utility model.
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 |
|---|---|---|---|
| CN201520416875.XU CN204633731U (en) | 2015-06-16 | 2015-06-16 | Signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520416875.XU CN204633731U (en) | 2015-06-16 | 2015-06-16 | Signal generator |
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| Publication Number | Publication Date |
|---|---|
| CN204633731U true CN204633731U (en) | 2015-09-09 |
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| CN201520416875.XU Active CN204633731U (en) | 2015-06-16 | 2015-06-16 | Signal generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901655A (en) * | 2015-06-16 | 2015-09-09 | 成都宜川电子科技有限公司 | Signal generator |
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2015
- 2015-06-16 CN CN201520416875.XU patent/CN204633731U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901655A (en) * | 2015-06-16 | 2015-09-09 | 成都宜川电子科技有限公司 | Signal generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180105 Address after: 610051 Sichuan province Chengdu city Chenghua District East three ring road two section Longtan Industrial Park Cheng Zhi Road, No. 6 14 Patentee after: Sichuan Siaipu Electronic Technology Co., Ltd. Address before: Longtan Industrial Park in Sichuan city of Chengdu province Huahan road 610000 No. 89 Chenghua District 2 building 12 floor Patentee before: CHENGDU E-CHUAN ELECTRONIC TECHNOLOGY CO., LTD. |