CN205862296U - A kind of single-chip microcomputer under-voltage reset circuit - Google Patents
A kind of single-chip microcomputer under-voltage reset circuit Download PDFInfo
- Publication number
- CN205862296U CN205862296U CN201620393432.8U CN201620393432U CN205862296U CN 205862296 U CN205862296 U CN 205862296U CN 201620393432 U CN201620393432 U CN 201620393432U CN 205862296 U CN205862296 U CN 205862296U
- Authority
- CN
- China
- Prior art keywords
- resistance
- chip microcomputer
- reset circuit
- audion
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Microcomputers (AREA)
Abstract
The utility model discloses a kind of single-chip microcomputer under-voltage reset circuit, including resistance R1, diode D1, resistance R2, electric capacity C1 and audion VT1, described resistance R one end connects power supply VC, audion VT1 emitter stage and microcontroller power supply end respectively, the resistance R1 other end connects ground connection diode D1 negative pole and resistance R2 respectively, resistance R2 other end connecting triode VT1 base stage, audion VT1 colelctor electrode connects earth resistance R4 and resistance R3 respectively, and the resistance R3 other end connects the reset terminal of ground capacity C1 and single-chip microcomputer respectively.This utility model single-chip microcomputer under-voltage reset circuit uses audion to coordinate Zener diode to be controlled, and effectively makes resetting voltage reach steady statue, it is to avoid release And Spread of Solute about electric charge in electric capacity in conventional reset circuit.
Description
Technical field
This utility model relates to a kind of reset circuit, specifically a kind of single-chip microcomputer under-voltage reset circuit.
Background technology
The reset circuit of prior art is generally connected by two electric capacity and a resistance and forms, the reset electricity of said structure
Road has the disadvantage that owing to this reset circuit does not has reset delay, i.e. discharges complete by time delay by the electric charge in electric capacity,
If the most not discharging complete by the electric charge in electric capacity, it will necessarily affect the reset of next time, thus affects this reset circuit
Functional reliability.
Utility model content
The purpose of this utility model is to provide a kind of single-chip microcomputer under-voltage reset circuit, to solve to carry in above-mentioned background technology
The problem gone out.
For achieving the above object, the following technical scheme of this utility model offer:
A kind of single-chip microcomputer under-voltage reset circuit, including resistance R1, diode D1, resistance R2, electric capacity C1 and audion VT1,
Described resistance R one end connects power supply VC, audion VT1 emitter stage and microcontroller power supply end respectively, and the resistance R1 other end connects respectively
Ground connection diode D1 negative pole and resistance R2, resistance R2 other end connecting triode VT1 base stage, audion VT1 colelctor electrode is respectively
Connecting earth resistance R4 and resistance R3, the resistance R3 other end connects the reset terminal of ground capacity C1 and single-chip microcomputer respectively.
As further program of the utility model: described diode D1 is Zener diode.
As further program of the utility model: described power supply VCC voltage is 5V.
As this utility model further scheme: the voltage stabilizing value of described diode D1 is 3.7V.
Compared with prior art, the beneficial effects of the utility model are: this utility model single-chip microcomputer under-voltage reset circuit is adopted
Coordinate Zener diode to be controlled with audion, effectively make resetting voltage reach steady statue, it is to avoid conventional reset circuit
About the release And Spread of Solute of electric charge in middle electric capacity.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of single-chip microcomputer under-voltage reset circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
Referring to Fig. 1, in this utility model embodiment, a kind of single-chip microcomputer under-voltage reset circuit, including resistance R1, diode
D1, resistance R2, electric capacity C1 and audion VT1, described resistance R one end connects power supply VC, audion VT1 emitter stage and monolithic respectively
Dynamo-electric source, the resistance R1 other end connects ground connection diode D1 negative pole and resistance R2, resistance R2 other end connecting triode respectively
VT1 base stage, audion VT1 colelctor electrode connects earth resistance R4 and resistance R3 respectively, and the resistance R3 other end connects ground connection electricity respectively
Hold C1 and the reset terminal of single-chip microcomputer；Described diode D1 is Zener diode；Described power supply VCC voltage is 5V；Described diode
The voltage stabilizing value of D1 is 3.7V.
Operation principle of the present utility model is: refers to Fig. 1,5V voltage and begins to ramp up from " 0V ", before rising to 3.6V,
Zener diode D1 is also at cut-off state all in cut-off state, VT1, exports without resetting voltage.When+5V supply voltage is higher than
After 3.6V, Zener diode D1 reverse breakdown, its both end voltage " is clamped " in 3.6V, when+5V supply voltage is higher than 4.3V
After, VT1 begins to turn on, and resetting voltage initially forms, as the close+5V of+5V supply voltage, and D1 saturation conduction, reset
Voltage reaches steady statue.
It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, it is possible to realize this practicality in other specific forms new
Type.Therefore, no matter from the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, this practicality is new
The scope of type is limited by claims rather than described above, it is intended that by the containing of equivalency in claim that fall
All changes in justice and scope are included in this utility model.Should not be considered as any reference in claim limiting
Involved claim.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps
Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should
Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment
May be appreciated other embodiments.
Claims (4)
1. a single-chip microcomputer under-voltage reset circuit, including resistance R1, diode D1, resistance R2, electric capacity C1 and audion VT1, its
Being characterised by, described resistance R one end connects power supply VC, audion VT1 emitter stage and microcontroller power supply end respectively, resistance R1 another
End connects ground connection diode D1 negative pole and resistance R2, resistance R2 other end connecting triode VT1 base stage, audion VT1 collection respectively
Electrode connects earth resistance R4 and resistance R3 respectively, and the resistance R3 other end connects the reset of ground capacity C1 and single-chip microcomputer respectively
End.
Single-chip microcomputer under-voltage reset circuit the most according to claim 1, it is characterised in that described diode D1 is voltage stabilizing two pole
Pipe.
Single-chip microcomputer under-voltage reset circuit the most according to claim 1, it is characterised in that described power supply VCC voltage is 5V.
Single-chip microcomputer under-voltage reset circuit the most according to claim 1, it is characterised in that the voltage stabilizing value of described diode D1 is
3.7V。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620393432.8U CN205862296U (en) | 2016-05-04 | 2016-05-04 | A kind of single-chip microcomputer under-voltage reset circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620393432.8U CN205862296U (en) | 2016-05-04 | 2016-05-04 | A kind of single-chip microcomputer under-voltage reset circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205862296U true CN205862296U (en) | 2017-01-04 |
Family
ID=57643479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620393432.8U Expired - Fee Related CN205862296U (en) | 2016-05-04 | 2016-05-04 | A kind of single-chip microcomputer under-voltage reset circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205862296U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112486060A (en) * | 2020-11-20 | 2021-03-12 | 深圳市沃特沃德股份有限公司 | Reset circuit, circuit board and electronic product of singlechip |
-
2016
- 2016-05-04 CN CN201620393432.8U patent/CN205862296U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112486060A (en) * | 2020-11-20 | 2021-03-12 | 深圳市沃特沃德股份有限公司 | Reset circuit, circuit board and electronic product of singlechip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205862296U (en) | A kind of single-chip microcomputer under-voltage reset circuit | |
| CN204596061U (en) | A kind of temperature-sensitive alarm control circuit | |
| CN204559975U (en) | A kind of stabilization protective circuit | |
| CN202797873U (en) | Light-emitting diode (LED) short-circuit protection circuit | |
| CN106158510A (en) | A kind of control relay circuit | |
| CN205141990U (en) | Soft start power controller | |
| CN205039703U (en) | Intelligence step -down formula switching power supply | |
| CN205015831U (en) | Inside singlechip reset circuit of computer | |
| CN205791484U (en) | A kind of undervoltage lockout circuit | |
| CN205490144U (en) | Constant voltage power supply controller | |
| CN202503331U (en) | Circuit and battery for reducing self-consumption of battery management chip | |
| CN205610478U (en) | Many functional safety electrical source controller | |
| CN204597774U (en) | A kind of negative voltage transition circuit | |
| CN204761759U (en) | LED drive circuit | |
| CN104836316A (en) | Current-adjustable constant current charging circuit | |
| CN205050070U (en) | Computer power supply circuit | |
| CN203747777U (en) | Reset circuit | |
| CN204681147U (en) | A kind of constant-current charging circuit of adjustable current | |
| CN204668913U (en) | A kind of voltage protection circuit | |
| CN205141293U (en) | Intelligence socket circuits | |
| CN204697035U (en) | A kind of relay delay control circuit | |
| CN204632671U (en) | A kind of control relay circuit | |
| CN204481461U (en) | A kind of compressor of air conditioner intelligent protection circuit | |
| CN204190617U (en) | A kind of temperature-compensating stabilized voltage power supply | |
| CN204464939U (en) | A kind of electronic type self-recoverage insurance circuit |
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: 20170104 Termination date: 20170504 |