CN203747777U - Reset circuit - Google Patents
Reset circuit Download PDFInfo
- Publication number
- CN203747777U CN203747777U CN201420147871.1U CN201420147871U CN203747777U CN 203747777 U CN203747777 U CN 203747777U CN 201420147871 U CN201420147871 U CN 201420147871U CN 203747777 U CN203747777 U CN 203747777U
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- China
- Prior art keywords
- capacitor
- triode
- resistance
- reset circuit
- diode
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Abstract
The utility model discloses a reset circuit which comprises resistors R1, R2, R3, an electrolytic capacitor CE1, a capacitor C1, a diode VD1 and a triode Q1, wherein one end of the resistor R1 and the anode of the electrolytic capacitor CE1 are connected with anode of a power supply, the cathode of the electrolytic capacitor CE1 is connected with one end of the resistor R2 and the cathode of the diode VD1, the other end of the resistor R2 is connected with one end of the resistor R3 and the b pole of the triode Q1, the c pole of the triode Q1 is connected with one end of the capacitor C1, and the other end of the resistor R1, the anode of the diode VD1, the other end of the resistor R3, the e pole triode and the other end of the capacitor C1 are connected with the cathode of the power supply. The reset circuit is low in production cost and high in work reliability.
Description
Technical field
The utility model relates to a kind of reset circuit.
Background technology
The reset circuit of prior art is connected to form by a reset chip, two electric capacity and a resistance.The reset circuit of said structure has the following disadvantages: owing to having adopted integrated reset chip, therefore will inevitably cause the production cost of prior art reset circuit higher.In addition, because this reset circuit does not have reset delay, by time delay, electric charge in electric capacity is discharged completely, if therefore the electric charge in electric capacity is discharged completely, it will inevitably affect next reset, thereby affects the functional reliability of this reset circuit.
Utility model content
The technical problems to be solved in the utility model is that the reset circuit that a kind of production cost is low and functional reliability is high is provided.
The technical solution of the utility model is, a kind of reset circuit is provided, and comprises resistance R 1, R2, R3, electrochemical capacitor CE1, capacitor C 1, diode VD1, triode Q1; One end of described resistance R 1, the positive pole of electrochemical capacitor CE1 are all connected with the positive pole of power supply; The negative pole of described electrochemical capacitor CE1 is connected with one end of resistance R 2, the negative electrode of diode VD1; The other end of described resistance R 2 is connected with one end of resistance R 3, the b utmost point of triode Q1; The c utmost point of described triode Q1 is connected with one end of capacitor C 1; The other end of the other end of the other end of described resistance R 1, the anode of diode VD1, resistance R 3, the e utmost point of triode Q1, capacitor C 1 is all connected with the negative pole of power supply.
Adopt after above structure, the utility model compared with prior art, has the following advantages:
What the utility model reset circuit adopted is the most common electronic device composition, therefore makes the production cost of the utility model reset circuit lower.In addition, because adopting electrochemical capacitor CE1, this reset circuit makes reset delay, also added that diode VD1 and electrochemical capacitor CE1 form loop, the electric charge of accelerating capacitor C discharges, thereby on having ensured to carry out in the extremely short time, once reset, and then make the functional reliability of this reset circuit higher.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the utility model reset circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, a kind of reset circuit of the utility model, comprises resistance R 1, R2, R3, electrochemical capacitor CE1, capacitor C 1, diode VD1, triode Q1; One end of described resistance R 1, the positive pole of electrochemical capacitor CE1 are all connected with the positive pole of power supply, adopt the VDD+5V power supply in Fig. 1; The negative pole of described electrochemical capacitor CE1 is connected with one end of resistance R 2, the negative electrode of diode VD1; The other end of described resistance R 2 is connected with one end of resistance R 3, the b utmost point of triode Q1; The c utmost point of described triode Q1 is connected with one end of capacitor C 1; The other end of the other end of the other end of described resistance R 1, the anode of diode VD1, resistance R 3, the e utmost point of triode Q1, capacitor C 1 is all connected with the negative pole (namely common ground end) of power supply, wherein very reset signal input of the b of triode Q1.
Operation principle: in the time that power supply one powers on, VDD+5V will give capacitor C E1 charging, in the process of charging to capacitor C E1, electric current in circuit can pass through capacitor C E1, and at this time the b utmost point of triode Q1 is to have transient voltage, and this voltage is greater than 0.7V, thereby triode Q1 transient switching, the current potential of RESET end also moment dragged down, in the time that MCU detects that the current potential of RESET end is drawn as low level state, can make the response that resets.After capacitor C E1 is full of electricity, capacitor C E1 is equivalent to an open circuit, and at this time triode Q1 is cut off, and reseting procedure finishes.
Below be only described with regard to most preferred embodiment of the present utility model, but can not be interpreted as it is limitations on claims.The utility model is not limited only to above embodiment, and its concrete structure allows to change.In every case the various variations of doing in the protection range of the utility model independent claims are all in protection range of the present utility model.
Claims (1)
1. a reset circuit, is characterized in that: comprise resistance R 1, R2, R3, electrochemical capacitor CE1, capacitor C 1, diode VD1, triode Q1; One end of described resistance R 1, the positive pole of electrochemical capacitor CE1 are all connected with the positive pole of power supply; The negative pole of described electrochemical capacitor CE1 is connected with one end of resistance R 2, the negative electrode of diode VD1; The other end of described resistance R 2 is connected with one end of resistance R 3, the b utmost point of triode Q1; The c utmost point of described triode Q1 is connected with one end of capacitor C 1; The other end of the other end of the other end of described resistance R 1, the anode of diode VD1, resistance R 3, the e utmost point of triode Q1, capacitor C 1 is all connected with the negative pole of power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420147871.1U CN203747777U (en) | 2014-03-28 | 2014-03-28 | Reset circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420147871.1U CN203747777U (en) | 2014-03-28 | 2014-03-28 | Reset circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203747777U true CN203747777U (en) | 2014-07-30 |
Family
ID=51347527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420147871.1U Expired - Fee Related CN203747777U (en) | 2014-03-28 | 2014-03-28 | Reset circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203747777U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106760993A (en) * | 2016-12-12 | 2017-05-31 | 上海图正信息科技股份有限公司 | A kind of electronic lock |
-
2014
- 2014-03-28 CN CN201420147871.1U patent/CN203747777U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106760993A (en) * | 2016-12-12 | 2017-05-31 | 上海图正信息科技股份有限公司 | A kind of electronic lock |
| CN106760993B (en) * | 2016-12-12 | 2019-08-20 | 上海图正信息科技股份有限公司 | A kind of electronic lock |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140730 Termination date: 20180328 |