CN204190733U - A kind of reset circuit realizing the high stability of time delay - Google Patents
A kind of reset circuit realizing the high stability of time delay Download PDFInfo
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- CN204190733U CN204190733U CN201420652877.4U CN201420652877U CN204190733U CN 204190733 U CN204190733 U CN 204190733U CN 201420652877 U CN201420652877 U CN 201420652877U CN 204190733 U CN204190733 U CN 204190733U
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Abstract
The utility model discloses a kind of reset circuit realizing the high stability of time delay, for carrying out time-delay reset for external equipment or prevent external equipment from repeatedly resetting when power-supply fluctuation in power supply electrifying process, comprise reset circuit and delay circuit.The utility model is in order to realize the reset that external equipment can be made reliable and stable, reduce the object of circuit cost simultaneously, do not adopt in prior art utilize RC reset circuit or by delay chip realize can time-delay reset circuit, but adopt two triodes to coordinate the design of biasing resistor, the delay operation for reset circuit is realized by triode Delayed conducting principle, improve the reliability of reset circuit, reduce the cost of delay circuit.
Description
Technical field
The utility model belongs to electronic circuit technology field, relates to a kind of reset circuit, specifically, relates to a kind of reset circuit realizing the high stability of time delay.
Background technology
When carrying out design of circuit system, each system needs one can the control unit of proper reset whole system, in system electrification or when crashing to system in CPU and other respectively possess reset function element circuit and carry out resets control.Reset control circuit is related to stable, the reliability that whole system is run.In prior art, RC reset circuit as shown in Figure 1, comprise RC circuit and reset power RESET, this RC circuit comprises resistance in parallel, electric capacity and diode, the termination power after above-mentioned three element in parallel, the other end meets electric capacity and the RESET input RESET respectively, the other end ground connection of electric capacity.But existing RC reset circuit, its power supply electrifying initial stage exports unstable, and in the process powered on, because power supply is unstable, need outside device reset, could decontrol reset after power good after after a while, external equipment starts normal work.And at the power supply electrifying initial stage, needing the peripheral circuit state of the system resetted also unstable, system is easy to cause work chaotic in this case, the stability of system is reduced, causes unnecessary loss.For improving this shortcoming, in the prior art, there is the circuit design with time-delay reset function, but the many employings of the existing reset circuit with delay function realize delay function (reset circuit as with watchdog chip) with the chip of delay function, because the price of the chip with delay function is high, the cost causing whole reset circuit is high.
Utility model content
The utility model proposes a kind of reset circuit realizing the high stability of time delay based on button multiplexing technology, and simplicity of design can realize time-delay reset, ensures the steady operation of product, can accomplish that again cost is as far as possible low.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of reset circuit realizing the high stability of time delay, for carrying out time-delay reset for external equipment or prevent external equipment from repeatedly resetting when power-supply fluctuation in power supply electrifying process, comprise reset circuit and delay circuit, reset circuit is connected power supply respectively with delay circuit, delay circuit comprises triode I and triode II, the base stage of triode I is connected with the collector electrode of triode II by resistance II, the grounded emitter of triode I and triode II, the collector electrode of triode I connects reset circuit.
Preferably, the above-mentioned reset circuit realizing the high stability of time delay, described delay circuit also comprises resistance III, resistance IV, resistance V and resistance VI; One end of described resistance IV, resistance V and resistance VI is Y-connection, the other end ground connection of resistance VI, and the other end of resistance V connects power supply, the base stage of the other end connecting triode II of resistance IV; The collector electrode of described triode II connects power supply by resistance III.
Preferably, the above-mentioned reset circuit realizing the high stability of time delay, described reset circuit is RC reset circuit, comprises resistance I and electric capacity I; Described resistance I and electric capacity I are connected, and its link exports reset signal, and the upper end of resistance I connects power supply, the lower end ground connection of electric capacity I.
Preferably, the above-mentioned reset circuit realizing the high stability of time delay, described resistance I is parallel with electric capacity II.
Preferably, the above-mentioned reset circuit realizing the high stability of time delay, described resistance I is parallel with diode I, and the negative pole of diode I connects power supply, and the positive pole of diode I connects the collector electrode of triode I in described delay circuit.
Preferably, the above-mentioned reset circuit realizing the high stability of time delay, described resistance VI is parallel with electric capacity III.
Preferably, the above-mentioned reset circuit realizing the high stability of time delay, the choosing value of described resistance and electric capacity requires as making triode I and triode II be in saturation conduction state in the course of the work.
The beneficial effects of the utility model are: the utility model is in order to realize the reset that external equipment can be made reliable and stable, reduce the object of circuit cost simultaneously, do not adopt in prior art utilize RC reset circuit or by delay chip realize can time-delay reset circuit, but adopt two triodes to coordinate the design of biasing resistor, the delay operation for reset circuit is realized by triode Delayed conducting principle, audion is simple, the course of work is reliable and stable, not fragile, long working life, improves the reliability of whole reset circuit.The components and parts that circuit design of the present utility model adopts are the low-cost components and parts such as resistance, electric capacity, diode and triode, and it is very low that its procurement price can control, and reduces the cost of delay circuit.
Accompanying drawing explanation
Fig. 1 is the structural representation of RC reset circuit in prior art;
Fig. 2 is the reset circuit connection diagram realizing the high stability of time delay of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in more detail.
The utility model is in order to realize the reset that external equipment can be made reliable and stable, reduce the object of circuit cost simultaneously, do not adopt in prior art and adopt RC reset circuit or can the watchdog chip reset circuit of time delay, but adopt two triodes to coordinate the design of biasing resistor, the delay operation for reset circuit is realized by triode Delayed conducting principle, improve the reliability of reset circuit, reduce the cost of delay circuit.
For realizing above-mentioned purpose of design, circuit design of the present utility model comprises reset circuit and delay circuit two parts, as shown in Figure 2, resistance I R1, electric capacity I C1, electric capacity II C2, diode I D1 realize reset circuit, and resistance II R2, resistance III R3, resistance IV R4, resistance V R5, resistance VI R6, triode I Q1, triode II Q2 and electric capacity III C3 realize delay circuit.
Reset circuit and delay circuit are connected power supply VCC respectively, and the base stage of triode I Q1 is connected with the collector electrode of triode II Q2 by resistance II R2, the grounded emitter of triode I Q1 and triode II Q2, and the collector electrode of triode I Q1 connects reset circuit.
One end of resistance IV R4, resistance V R5 and resistance VI R6 is Y-connection, the other end ground connection of resistance VI R6, and the other end of resistance V R5 connects power supply, the base stage of other end connecting triode II Q2 of resistance IV R4; The collector electrode of described triode II Q2 connects power supply VCC by resistance III R3.
Reset circuit is the RC series connection reset circuit of Low level effective, comprises resistance I R1 and electric capacity I C1; Described resistance I R1 and electric capacity I C1 connects, and the upper end that its link exports reset signal RESET, resistance I R1 connects power supply VCC, the lower end ground connection of electric capacity I C1.Resistance I R1 is parallel with electric capacity II C2 and diode I D1, and the negative pole of diode I D1 connects power supply VCC, and the collector electrode of positive pole connecting triode I Q1 of diode I D1, resistance VI R6 is parallel with electric capacity III C3.
Foregoing circuit design is the Delayed conducting function by triode I Q1 and triode II Q2, makes the delays time to control of whole delay circuit realization to reset circuit.In the prior art, the Main Function of triode is amplifying signal, and in this circuit design, do not need the signal of telecommunication to amplify, the choosing value of its each electric capacity and resistance requires as making triode I Q1 and triode II Q2 be in saturation conduction state in the course of the work, can not export by amplifying signal.The effect of diode I D1 makes the reverse repid discharge of electric capacity II C2, the spike act as in filter out power VCC of electric capacity III C3, ensures that power supply VCC's is stable.
The course of work of circuit design of the present utility model is as follows:
In the process powered on, because power supply is unstable, need outside device reset, after after a while, could decontrol reset after power good, external equipment starts normal work.
When the moment powered on, VCC voltage slowly rises, and under R5, terminal voltage also slowly rises, and before this point voltage is lower than 0.7v, Q2 closes Q1 conducting, and RESET point drags down by Q1, and external equipment is resetted.VCC continues to rise, after terminal voltage under R5 is higher than 0.7V, Q2 conducting, Q1 closes, then now VCC is charged to C1 by R1, and form RC reset circuit, now RESET point voltage slowly rises, until voltage arrive external equipment reset threshold after external equipment start normal work, R2R3R4R5R6Q1Q2C3 realizes delay circuit makes VCC power on time-delay reset in a flash.
Another kind of situation, when external equipment normally works, supply voltage causes brief electrical pressure drop low for a certain reason, if the time is very short, and have the existence of filter capacitor, this very of short duration voltage reduces and can not have an impact to product work, if do not have delay circuit, can cause, whenever voltage reduces, external equipment will reset once, if repeatedly there is the situation that voltage reduces, then there will be external equipment and repeatedly reset, cause product unstable.If supply voltage lands the long period really, now to external equipment normally work have an impact time, then reset circuit will reset external equipment, avoids external equipment misoperation, affects product stability.
In this embodiment, the choosing value of each electric capacity, resistance and all the other components and parts, type selecting can be:
R1 is 200k ohm, and R2 is 1k ohm, and R3 is 4.7k ohm, and R4 is 1k ohm, R5 is 27k ohm, and R6 is 8.2k ohm, and C1 is 4.7uF/6.3V, C2 is 0.01uF/25V, the model of C3 to be the model of 4.7uF/6.3V, D1 be 1N4148WT, Q1 and Q2 is MMBT3904LT1G.The magnitude of voltage of its VCC determines according to the type selecting of the resetting voltage of external equipment and each components and parts.In actual implementation process, the selection gist of above-mentioned electric capacity, resistance is: the saturation conduction state ensureing Q1 and Q2, can not make Q1 and Q2 be in signal of telecommunication magnifying state.
There is another one embodiment in circuit design of the present utility model, its reset circuit is the circuit design of high level restoration type, this embodiment and above-described embodiment not being all in circuit design, resistance I R1 in above-described embodiment and electric capacity I C1 position are in circuit exchanged, i.e. grounding through resistance, and electric capacity connects power supply VCC.
Certainly; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited in above-mentioned citing, the change that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also should belong to protection range of the present utility model.
Claims (6)
1. one kind can realize the reset circuit of the high stability of time delay, comprise reset circuit and delay circuit, reset circuit is connected power supply respectively with delay circuit, it is characterized in that: delay circuit comprises triode I and triode II, the base stage of triode I is connected with the collector electrode of triode II by resistance II, the grounded emitter of triode I and triode II, the collector electrode of triode I connects reset circuit.
2. the reset circuit realizing the high stability of time delay according to claim 1, is characterized in that: described delay circuit also comprises resistance III, resistance IV, resistance V and resistance VI; One end of described resistance IV, resistance V and resistance VI is Y-connection, the other end ground connection of resistance VI, and the other end of resistance V connects power supply, the base stage of the other end connecting triode II of resistance IV; The collector electrode of described triode II connects power supply by resistance III.
3. the reset circuit realizing the high stability of time delay according to claim 2, is characterized in that: described reset circuit is RC reset circuit, comprises resistance I and electric capacity I; Described resistance I and electric capacity I are connected, and its link exports reset signal, and one end of resistance I connects power supply, the other end ground connection of electric capacity I.
4. the reset circuit realizing the high stability of time delay according to claim 3, is characterized in that: described resistance I is parallel with electric capacity II.
5. the reset circuit realizing the high stability of time delay according to claim 4, it is characterized in that: described resistance I is parallel with diode I, the negative pole of diode I connects power supply, and the positive pole of diode I connects the collector electrode of triode I in described delay circuit.
6. the reset circuit realizing the high stability of time delay according to claim 5, is characterized in that: described resistance VI is parallel with electric capacity III.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420652877.4U CN204190733U (en) | 2014-11-04 | 2014-11-04 | A kind of reset circuit realizing the high stability of time delay |
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| CN201420652877.4U CN204190733U (en) | 2014-11-04 | 2014-11-04 | A kind of reset circuit realizing the high stability of time delay |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333360A (en) * | 2014-11-04 | 2015-02-04 | 青岛歌尔声学科技有限公司 | High-stability reset circuit capable of realizing time delay |
| CN107749666A (en) * | 2017-10-27 | 2018-03-02 | 天津津航计算技术研究所 | Electric control system and control method in a kind of SUAV photoelectric nacelle delay |
| CN117406698A (en) * | 2023-12-12 | 2024-01-16 | 广汽埃安新能源汽车股份有限公司 | ECU fault processing method and device in brushing process |
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2014
- 2014-11-04 CN CN201420652877.4U patent/CN204190733U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333360A (en) * | 2014-11-04 | 2015-02-04 | 青岛歌尔声学科技有限公司 | High-stability reset circuit capable of realizing time delay |
| CN107749666A (en) * | 2017-10-27 | 2018-03-02 | 天津津航计算技术研究所 | Electric control system and control method in a kind of SUAV photoelectric nacelle delay |
| CN107749666B (en) * | 2017-10-27 | 2021-03-05 | 天津津航计算技术研究所 | Delayed power-on control system and control method for photoelectric pod of small unmanned aerial vehicle |
| CN117406698A (en) * | 2023-12-12 | 2024-01-16 | 广汽埃安新能源汽车股份有限公司 | ECU fault processing method and device in brushing process |
| CN117406698B (en) * | 2023-12-12 | 2024-03-01 | 广汽埃安新能源汽车股份有限公司 | ECU fault processing method and device in brushing process |
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