CN204498099U - One responds output circuit fast - Google Patents
One responds output circuit fast Download PDFInfo
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- CN204498099U CN204498099U CN201520077040.6U CN201520077040U CN204498099U CN 204498099 U CN204498099 U CN 204498099U CN 201520077040 U CN201520077040 U CN 201520077040U CN 204498099 U CN204498099 U CN 204498099U
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Abstract
The utility model discloses one and respond output circuit fast, comprising: output mos pipe, its source electrode receives supply voltage, and its grid receives and exports conducting and the shutoff that control signal controls output mos pipe, and its drain electrode exports output level; Bleeder circuit, exports described output level dividing potential drop and exports partitioned level at its output; ON-OFF control circuit, its control end receives described partitioned level, produces switch level and exported by its output according to partitioned level; Charge-discharge circuit, starts charging when switch level saltus step is high, obtain response limiting level and exported by its output according to charge condition; And response promotes circuit, its control end receives described response limiting level, its input receives described output level, its earth terminal ground connection, and response described in the response limiting Automatic level control exported during described charge-discharge circuit charging promotes circuit and dragged down by described output level.The utility model can make output fast in response to output control signal, and output level drags down fast.
Description
Technical field
The utility model relates to integrated circuit fields, particularly relates to one and responds output circuit fast.
Background technology
With metal-oxide-semiconductor (Metal Oxide Semiconductor, MOS field field effect transistor) in output circuit as main output precision, control metal-oxide-semiconductor conducting to closedown by output control signal and control the corresponding output signal of output, the regular hour is needed owing to electrically changing in N raceway groove in metal-oxide-semiconductor or P raceway groove, slow by the response speed of output signal after controlling to turn off at metal-oxide-semiconductor thus, such output signal is not suitable for the occasion needing high-speed response, such as in the output circuit of safety relay, when exporting control signal control metal-oxide-semiconductor shutoff, output signal can not make an immediate response change, safety device will be caused at once suddenly not stopped by control, that is the delay outputing signal response makes the action of safety device create potential safety hazard, thus the output to output circuit makes improvements to accelerate to export output circuit is needed to respond.
Utility model content
The purpose of this utility model is to provide one and responds output circuit fast, and can make output fast in response to output control signal, output level drags down fast.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: one responds output circuit fast, comprising:
Output mos pipe, its source electrode receives supply voltage, and its grid receives and exports conducting and the shutoff that control signal controls output mos pipe, and its drain electrode exports output level;
Bleeder circuit, exports described output level dividing potential drop and exports partitioned level at its output;
ON-OFF control circuit, its control end receives described partitioned level, produces switch level and exported by its output according to partitioned level;
Charge-discharge circuit, is controlled by described switch level, starts charging when switch level saltus step is high, obtains response limiting level and exported by its output according to charge condition; And
Response promotes circuit, and its control end receives described response limiting level, and its input receives described output level, its earth terminal ground connection, and response described in the response limiting Automatic level control exported during described charge-discharge circuit charging promotes circuit and dragged down by described output level.
According to an embodiment of the present utility model, when described response limiting level is high, described response promotes circuit and is dragged down by described output level.
According to an embodiment of the present utility model, described response promotes circuit and comprises:
First triode, the control end that its base stage promotes circuit as described response receives described response limiting level, and its emitter promotes the earth terminal ground connection of circuit as described response;
First diode, its negative electrode connects the collector electrode of described first triode, and its anode connects the input of described bleeder circuit by resistance;
Wherein, when response limiting level is high, described first triode ON, output level is dragged down by grounding through resistance.
According to an embodiment of the present utility model, described charge-discharge circuit comprises:
Electric capacity, the output that its first end connects described ON-OFF control circuit receives described switch level;
First resistance, its first end connects the second end of described electric capacity, and its second end connects the control end that described response promotes circuit;
Second diode, its anode connects the second end of described first resistance, and its negative electrode connects the second end of described electric capacity;
Second resistance, its first end connects the second end of described first resistance, its second end ground connection;
Wherein, when switch level saltus step is high, described electric capacity, the first resistance, the second resistance form charging circuit, and it is high level that the second end of described first resistance exports control level, and at the end of charging, it is low level that the second end of described first resistance exports control level.
According to an embodiment of the present utility model, described ON-OFF control circuit comprises:
First switching tube, its control end couples the output of described bleeder circuit, its earth terminal ground connection;
Second triode, its base stage connects the output of described first switching tube, its base stage is connected by resistance with collector electrode, its base stage is connected by diode with emitter, wherein the anode of diode and emitter connect, and phase contact exports described switch level as the output of described ON-OFF control circuit.
According to an embodiment of the present utility model, described ON-OFF control circuit comprises:
Second switch pipe, its control end connects described bleeder circuit output by resistance, and its power end connects the drain electrode of described output mos pipe;
First switching tube, its control end couples the output of described second switch pipe, its earth terminal ground connection;
Second triode, its base stage connects the output of described first switching tube, its base stage is connected by resistance with collector electrode, its base stage is connected by diode with emitter, wherein the anode of diode and emitter connect, and phase contact exports described switch level as the output of described ON-OFF control circuit.
According to an embodiment of the present utility model, described bleeder circuit comprises: the resistance of multiple serial connection, and wherein, one end of first resistance connects the drain electrode of output mos pipe, one end ground connection of tail resistance, a contact in multiple resistance serial connection point is as the output of described bleeder circuit.
After adopting technique scheme, the utility model compared with prior art has following outstanding advantages: the output of output mos pipe combines the effect that response promotes circuit while exporting control signal, can when exporting control signal and controlling the shutoff of output mos pipe, accelerate to drag down output level, first by bleeder circuit, output level dividing potential drop is exported to obtain the partitioned level that voltage is suitable for control switch control circuit, then the discharge and recharge of charge-discharge circuit is controlled by ON-OFF control circuit, when the output control signal that output mos pipe receives controls its shutoff, output level can reduce, partitioned level reduces thereupon, ON-OFF control circuit exports respective switch level according to this partitioned level, when partitioned level reduces, switch level is high, charge-discharge circuit starts charging immediately, in charging process, the response limiting level that charge-discharge circuit exports is high level, thus make response promote circuit input end and ground conducting, described output level is dragged down.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of a kind of quick response output circuit of the utility model embodiment;
Fig. 2 is the circuit diagram of a kind of quick response output circuit of the utility model one embodiment;
Fig. 3 is the circuit diagram of a kind of quick response output circuit of another embodiment of the utility model.
Embodiment
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail embodiment of the present utility model below in conjunction with accompanying drawing.
Set forth a lot of detail in the following description so that fully understand the utility model.But the utility model can be much different from alternate manner described here to implement, those skilled in the art can when doing similar popularization without prejudice to when the utility model intension, and therefore the utility model is by the restriction of following public concrete enforcement and concrete accompanying drawing.
Fig. 1 shows one and responds output circuit fast, comprise: the output mos pipe M1 exporting corresponding output level Vout by exporting control signal (generally being provided by single-chip microcomputer or control circuit) driving, this output level Vout dividing potential drop is exported to the bleeder circuit 1 of partitioned level, play switch control rule effect and controlled the ON-OFF control circuit 2 of its on-off action by partitioned level, the switch level exported according to ON-OFF control circuit 2 and the charge-discharge circuit 3 that charges, and accordingly circuit 4 is promoted to the response that the output level Vout by high step-down drags down fast according to the response limiting level of the charge condition gained of this charge-discharge circuit 3.
Wherein, output mos pipe M1, that the present embodiment adopts is P (positive, P raceway groove) type metal-oxide-semiconductor, it is (not shown on figure that its source electrode receives supply voltage, be such as 24V voltage source), its grid receives and exports conducting and the shutoff that control signal controls output mos pipe M1, and its drain electrode exports output level Vout; Bleeder circuit 1, its input receives this output level Vout, and this output level Vout exports and exports partitioned level at the output of bleeder circuit 1 after dividing potential drop, and partitioned level is lower than the value of output level Vout; ON-OFF control circuit 2, connect bleeder circuit 1, its control end receives described partitioned level, produces switch level and exported by its output according to partitioned level; Charge-discharge circuit 3, is controlled by described switch level, starts charging when switch level saltus step is high, obtains response limiting level and exported by its output according to charge condition; Response promotes circuit 4, and its control end receives described response limiting level, and its input receives described output level, its earth terminal ground connection, and response described in the response limiting Automatic level control exported during described charge-discharge circuit charging promotes circuit and dragged down by described output level.
Referring to Fig. 1, when output control signal is negative signal (voltage lower than source electrode), output mos pipe M1 conducting, output level Vout is high level, the partitioned level that now bleeder circuit exports is similarly high level, the switch level of ON-OFF control circuit not conducting, output is low level, and the response limiting level that charge-discharge circuit exports is low level.
In one embodiment, when described response limiting level is high, described response promotes circuit and is dragged down by described output level.When output control signal is positive signal (voltage higher than source electrode), output mos pipe M1 closes, output level Vout changes low level into by high level, when closing, output level Vout non-immediate reduces to 0V, reduce to 0V and need the regular hour, after bleeder circuit senses the reduction of output level Vout, the partitioned level exported reduces (only makes switching signal at this partitioned level, ON-OFF control circuit conducting can be made) lower than during a certain threshold value, make ON-OFF control circuit conducting, the switch level exported is high level, charge-discharge circuit starts charging to make the response limiting level of output for high level, thus control response lifting circuit drags down output level Vout.
As shown in Figure 2, described bleeder circuit 1 comprises: the resistance of multiple serial connection, and wherein, one end of first resistance connects the drain electrode of output mos pipe, one end ground connection of tail resistance, and a contact in multiple resistance serial connection point is as the output of described bleeder circuit.Concrete, resistance R1 one end connect output mos pipe drain electrode and as the input of bleeder circuit 1, the other end connects the anode of diode D1, one end of the negative electrode contact resistance R2 of diode D1, the other end of resistance R2 connects the anode of secondary D2, the minus earth of diode D2, wherein, the negative electrode of diode D1 exports partitioned level as the output of bleeder circuit 1.Be appreciated that bleeder circuit is the circuit realizing dividing potential drop, the utility model bleeder circuit is not limited to the form shown in Fig. 2.
Continue referring to Fig. 2, described ON-OFF control circuit 2 comprises: the first switching tube M2, its control end couples the output of described bleeder circuit by resistance R3 and diode D3, its earth terminal ground connection, the first switching tube M2 that the present embodiment is chosen is N-type technotron, and thus control end voltage is higher than the first switching tube M2 conducting during earth terminal; Second triode Q1 (being NPN type in Fig. 2), its base stage connects the output of described first switching tube M2, its base stage is connected by resistance R4 with collector electrode simultaneously, its base stage is connected by diode D4 with emitter, wherein the anode of diode D4 and emitter connect, and phase contact exports described switch level as the output of described ON-OFF control circuit 2.
Continue referring to Fig. 2, described charge-discharge circuit 3 comprises: electric capacity C, and the output that its first end connects described ON-OFF control circuit 2 receives described switch level; First resistance R5, its first end connects second end of described electric capacity C, and its second end connection response promotes the control end of circuit 4; Second diode D5, its anode connects second end of described first resistance R5, and its negative electrode connects second end of described electric capacity C; Second resistance R6, its first end connects second end of described first resistance R5, its second end ground connection; Wherein, when switch level saltus step is high, described electric capacity C, the first resistance R5, the second resistance R6 form charging circuit, and it is high level that second end of described first resistance R5 exports control level, at the end of charging, it is low level that second end of described first resistance R5 exports control level.
Continue referring to Fig. 2, described response promotes circuit 4 and comprises: the first triode Q2, and the control end that its base stage promotes circuit 4 as described response receives described response limiting level, and its emitter promotes the earth terminal ground connection of circuit 4 as described response; First diode D6, its negative electrode connects the collector electrode of described first triode Q2, and its anode connects the input (namely the output of output mos pipe M1) of described bleeder circuit 1 by resistance; Wherein, when response limiting level is high, described first triode Q2 conducting, output level is dragged down by grounding through resistance.
When output mos pipe becomes closedown from conducting, output level Vout reduces, but be reduced to 0V and need certain hour, be not suitable for the occasion of high-speed response, in the present embodiment, the reduction of this output level responded to by bleeder circuit, the partitioned level exported also decreases, therefore first switching tube M2 closes, the base stage of the second triode Q1 is high level, thus the second triode Q1 conducting, electric capacity C starts charging, in charging process, the intermediate node of the first resistance R5 and the second resistance R6 is high level, therefore the first triode Q2 conducting, therefore output level Vout couples ground by resistance R7 and diode D6, output level is dragged down, after electric capacity C is full of, the intermediate node of the first resistance R5 and the second resistance R6 comes back to low level, first triode Q2 no longer conducting, thus can not make output level Vout uprise level initial time dragged down.Can drag down rapidly when making output level Vout change low level by high level, not affect output level Vout is changed high level state by low level simultaneously.
An embodiment as shown in Figure 3, be with the difference of the embodiment shown in Fig. 2, described ON-OFF control circuit 2 comprises: second switch pipe M3, its control end connects the output of described bleeder circuit 1 by resistance R8, its power end connects the drain electrode of described output mos pipe, for preventing voltage play abnormal, series diode D7 between the control end and power end of second switch pipe M3, wherein control end connects the negative electrode of diode D7; First switching tube M2, its control end couples the output of described second switch pipe M3 by resistance R3 and diode D3, and diode D3 anode connects the output of second switch pipe M3, the earth terminal ground connection of the first switching tube M2; Second triode Q1 (being NPN type in Fig. 3), its base stage connects the output of described first switching tube M2, its base stage is connected by resistance R4 with collector electrode simultaneously, its base stage is connected by diode D4 with emitter, wherein the anode of diode D4 and emitter connect, and phase contact exports described switch level as the output of described ON-OFF control circuit 2.
When output mos pipe becomes closedown from conducting, output level Vout reduces, but be reduced to 0V and need certain hour, be not suitable for the occasion of high-speed response, in the present embodiment, the reduction of this output level responded to by bleeder circuit 1, the partitioned level exported also decreases, second switch pipe M3 closes, therefore first switching tube M2 also closes, the base stage of the second triode Q1 is high level, thus the second triode Q1 conducting, electric capacity C starts charging, in charging process, the intermediate node of the first resistance R5 and the second resistance R6 is high level, therefore the first triode Q2 conducting, therefore output level Vout couples ground by resistance R7 and diode D6, output level is dragged down, after electric capacity C is full of, the intermediate node of the first resistance R5 and the second resistance R6 comes back to low level, first triode Q2 no longer conducting, thus can not make output level Vout uprise level initial time dragged down.Can drag down rapidly when making output level Vout change low level by high level, not affect output level Vout is changed high level state by low level simultaneously.
The output signal of the output of each switching tube in ON-OFF control circuit is for controlling next stage circuit, each output signal is only compared in the conduction threshold of next stage circuit and (is regarded as switching signal, for the switch of control switch pipe and triode in Fig. 2 and Fig. 3, namely these output signals only need the threshold value meeting switching tube and triode ON condition), do not need these output signals to be reduced to 0V, the output response of each switching tube thus in ON-OFF control circuit is without the need to considering.In addition, the switching tube in Fig. 2 and Fig. 3 breaker in middle control circuit and triode all can be replaced switching tube and the triode of opposite polarity, and make accommodation to circuit, do not repeat them here.
The utility model combines the effect that response promotes circuit by the output of output mos pipe while exporting control signal, can when exporting control signal and controlling the shutoff of output mos pipe, accelerate to drag down output level, first by bleeder circuit, output level dividing potential drop is exported to obtain the partitioned level that voltage is suitable for control switch control circuit, then the discharge and recharge of charge-discharge circuit is controlled by ON-OFF control circuit, when the output control signal that output mos pipe receives controls its shutoff, output level can reduce, partitioned level reduces thereupon, ON-OFF control circuit exports respective switch level according to this partitioned level, when partitioned level reduces, switch level is high, charge-discharge circuit starts charging immediately, in charging process, the response limiting level that charge-discharge circuit exports is high level, thus make response promote circuit input end and ground conducting, described output level is dragged down.
Although the utility model with preferred embodiment openly as above; but it is not for limiting claim; any those skilled in the art are not departing from spirit and scope of the present utility model; can make possible variation and amendment, the scope that therefore protection range of the present utility model should define with the utility model claim is as the criterion.
Claims (7)
1. respond an output circuit fast, it is characterized in that, comprising:
Output mos pipe, its source electrode receives supply voltage, and its grid receives and exports conducting and the shutoff that control signal controls output mos pipe, and its drain electrode exports output level;
Bleeder circuit, exports described output level dividing potential drop and exports partitioned level at its output;
ON-OFF control circuit, its control end receives described partitioned level, produces switch level and exported by its output according to partitioned level;
Charge-discharge circuit, is controlled by described switch level, starts charging when switch level saltus step is high, obtains response limiting level and exported by its output according to charge condition; And
Response promotes circuit, and its control end receives described response limiting level, and its input receives described output level, its earth terminal ground connection, and response described in the response limiting Automatic level control exported during described charge-discharge circuit charging promotes circuit and dragged down by described output level.
2. respond output circuit fast as claimed in claim 1, it is characterized in that, when described response limiting level is high, described response promotes circuit and is dragged down by described output level.
3. respond output circuit fast as claimed in claim 2, it is characterized in that, described response promotes circuit and comprises:
First triode, the control end that its base stage promotes circuit as described response receives described response limiting level, and its emitter promotes the earth terminal ground connection of circuit as described response;
First diode, its negative electrode connects the collector electrode of described first triode, and its anode connects the input of described bleeder circuit by resistance;
Wherein, when response limiting level is high, described first triode ON, output level is dragged down by grounding through resistance.
4. respond output circuit fast as claimed in claim 1, it is characterized in that, described charge-discharge circuit comprises:
Electric capacity, the output that its first end connects described ON-OFF control circuit receives described switch level;
First resistance, its first end connects the second end of described electric capacity, and its second end connects the control end that described response promotes circuit;
Second diode, its anode connects the second end of described first resistance, and its negative electrode connects the second end of described electric capacity;
Second resistance, its first end connects the second end of described first resistance, its second end ground connection;
Wherein, when switch level saltus step is high, described electric capacity, the first resistance, the second resistance form charging circuit, and it is high level that the second end of described first resistance exports control level, and at the end of charging, it is low level that the second end of described first resistance exports control level.
5. respond output circuit fast as claimed in claim 1, it is characterized in that, described ON-OFF control circuit comprises:
First switching tube, its control end couples the output of described bleeder circuit, its earth terminal ground connection;
Second triode, its base stage connects the output of described first switching tube, its base stage is connected by resistance with collector electrode, its base stage is connected by diode with emitter, wherein the anode of diode and emitter connect, and phase contact exports described switch level as the output of described ON-OFF control circuit.
6. respond output circuit fast as claimed in claim 1, it is characterized in that, described ON-OFF control circuit comprises:
Second switch pipe, its control end connects described bleeder circuit output by resistance, and its power end connects the drain electrode of described output mos pipe;
First switching tube, its control end couples the output of described second switch pipe, its earth terminal ground connection;
Second triode, its base stage connects the output of described first switching tube, its base stage is connected by resistance with collector electrode, its base stage is connected by diode with emitter, wherein the anode of diode and emitter connect, and phase contact exports described switch level as the output of described ON-OFF control circuit.
7. respond output circuit fast as claimed in claim 1, it is characterized in that, described bleeder circuit comprises: the resistance of multiple serial connection, wherein, one end of first resistance connects the drain electrode of output mos pipe, one end ground connection of tail resistance, a contact in multiple resistance serial connection point is as the output of described bleeder circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520077040.6U CN204498099U (en) | 2015-02-03 | 2015-02-03 | One responds output circuit fast |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520077040.6U CN204498099U (en) | 2015-02-03 | 2015-02-03 | One responds output circuit fast |
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| Publication Number | Publication Date |
|---|---|
| CN204498099U true CN204498099U (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520077040.6U Expired - Fee Related CN204498099U (en) | 2015-02-03 | 2015-02-03 | One responds output circuit fast |
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| CN (1) | CN204498099U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114237079A (en) * | 2021-09-30 | 2022-03-25 | 宁波三星智能电气有限公司 | Circuit capable of utilizing serial port to turn off power supply |
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2015
- 2015-02-03 CN CN201520077040.6U patent/CN204498099U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114237079A (en) * | 2021-09-30 | 2022-03-25 | 宁波三星智能电气有限公司 | Circuit capable of utilizing serial port to turn off power supply |
| CN114237079B (en) * | 2021-09-30 | 2024-04-30 | 宁波三星智能电气有限公司 | Circuit capable of utilizing serial port to turn off power supply |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150722 Termination date: 20190203 |
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| CF01 | Termination of patent right due to non-payment of annual fee |