CN202168052U - Multi-power reset circuit - Google Patents
Multi-power reset circuit Download PDFInfo
- Publication number
- CN202168052U CN202168052U CN2011202019131U CN201120201913U CN202168052U CN 202168052 U CN202168052 U CN 202168052U CN 2011202019131 U CN2011202019131 U CN 2011202019131U CN 201120201913 U CN201120201913 U CN 201120201913U CN 202168052 U CN202168052 U CN 202168052U
- Authority
- CN
- China
- Prior art keywords
- triode
- resistance
- voltage checking
- checking chip
- electric capacity
- 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 - Lifetime
Links
Abstract
The utility model discloses a multi-power reset circuit which comprises a voltage detecting chip and a first working power supply used for supplying power for the voltage detecting chip. An output end of the voltage detecting chip is connected with a base electrode of a triode; a second capacitor is arranged between the voltage detecting chip and the base electrode of the triode; an emitting electrode of the triode is grounded; a collector electrode of the triode is connected with a second working power supply; a third capacitor is arranged between the collector electrode and the emitting electrode of the triode; a third resistor is arranged between the base electrode and the emitting electrode of the triode; and one end of the second capacitor, which is far away from the triode, is connected with a second resistor, and the other end of the second resistor is electrically connected with the third resistor. The multi-power reset circuit has the advantages of stable work, low cost and wide scope of application.
Description
Technical field
The utility model relates to a kind of many power reset circuits.
Background technology
At electronic applications, reset circuit is a kind of indispensable circuit.The design of the reset circuit that in the overwhelming majority's circuit design, all comprises.Use in the low level reset circuit prevailing be a kind of rc reset circuit, it has simply, advantages such as cheapness.But the waveform of this circuit is slower, and consistency is poor, and can't judge whether voltage is stable.Can't be implemented in simultaneously when power supply switches and export reset signal, so can't use this simple reset circuit reset signal to be provided as MCU in the electric energy meter field.
Summary of the invention
For overcoming the shortcoming that common reset circuit can't directly be used for electric energy meter, the utility model provides a kind of can directly apply to electric energy meter, safe and reliable, many power reset circuits that cost is suitable.
Many power reset circuits; Comprise voltage checking chip; Be first working power of described voltage checking chip power supply, the output of described voltage checking chip is connected with the base stage of triode, is provided with second electric capacity between described voltage checking chip and the transistor base; The grounded emitter of described triode; The collector electrode of described triode is connected with second working power, is provided with the 3rd electric capacity between the collector electrode of described triode and the emitter, is provided with the 3rd resistance between the base stage of described triode and the emitter;
End away from triode of described second electric capacity is connected with second resistance, and the other end of described second resistance is connected with the 3rd resistance.
Further, described voltage checking chip is parallelly connected with first electric capacity.
Further, be provided with first resistance between the described voltage checking chip and second electric capacity, be provided with the 4th resistance between described second working power and the described transistor collector.
The technical conceive of the utility model is: when power supply that voltage checking chip detected is low level; The chip output pin connects the NPN transistor base; Cause triode to end like this, thereby transistor collector place reset signal is drawn the maintenance high level on another power supply.And when power supply that voltage checking chip detected during greater than the detection voltage of chip; Chip output pin output high level; Through discharging and recharging of electric capacity; Make triode end after the first conducting sometime, so just make reset signal drag down afterwards earlier and raise, thereby cause that MCU resets sometime.
The utility model is specially adapted to when power supply switches, need produce in the Electronic Design of reset signal, designs like electric energy meter.The utlity model has working stability, with low cost, and the advantage of applied range.
Description of drawings
Fig. 1 is the sketch map of the utility model.
Embodiment
With reference to accompanying drawing, further specify the utility model:
Many power reset circuits; Comprise voltage checking chip IC1; Be the first working power VCC of described voltage checking chip IC1 power supply, the output of described voltage checking chip IC1 is connected with the base stage of triode Q1, is provided with second capacitor C 2 between described voltage checking chip IC1 and the triode Q1 base stage; The grounded emitter of described triode Q1; The collector electrode of described triode Q1 is connected with the second working power VCCPU, is provided with the 3rd capacitor C 3 between the collector electrode of described triode Q1 and the emitter, is provided with the 3rd resistance R 3 between the base stage of described triode Q1 and the emitter;
End away from triode Q1 of described second capacitor C 2 is connected with second resistance R 2, and the other end of described second resistance R 2 is connected with the 3rd resistance R 3.
Described voltage checking chip IC1 is parallelly connected with first capacitor C 1.
Be provided with first resistance R 1 between the described voltage checking chip IC1 and second capacitor C 2, be provided with the 4th resistance R 4 between described second working power VCCPU and the described triode Q1 collector electrode.
The technical conceive of the utility model is: when the power supply VCC that is detected as voltage checking chip IC1 is low level; Chip output pin OUT connects NPN triode Q1 base stage; Cause triode Q1 to end like this, thereby triode Q1 collector electrode place reset signal RST is drawn the maintenance high level on another power supply VCCPU.And the power supply VCC that is detected as voltage checking chip IC1 is during greater than the detection voltage of chip; Chip output pin OUT exports high level; Through discharging and recharging of capacitor C 2; Make triode Q1 end after the first conducting sometime, so just make reset signal RST drag down afterwards earlier and raise, thereby cause that MCU resets sometime.
The utlity model has working stability, with low cost, and the advantage of applied range.
The described content of this specification embodiment only is enumerating the way of realization of utility model design; The protection range of the utility model should not be regarded as and only limit to the concrete form that embodiment states, the protection range of the utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.
Claims (3)
1. many power reset circuits; It is characterized in that: comprise voltage checking chip; Be first working power of described voltage checking chip power supply, the output of described voltage checking chip is connected with the base stage of triode, is provided with second electric capacity between described voltage checking chip and the transistor base; The grounded emitter of described triode; The collector electrode of described triode is connected with second working power, is provided with the 3rd electric capacity between the collector electrode of described triode and the emitter, is provided with the 3rd resistance between the base stage of described triode and the emitter;
End away from triode of described second electric capacity is connected with second resistance, and the other end of described second resistance is connected with the 3rd resistance.
2. many power reset circuits as claimed in claim 1 is characterized in that: described voltage checking chip is parallelly connected with first electric capacity.
3. according to claim 1 or claim 2 many power reset circuits is characterized in that: be provided with first resistance between the described voltage checking chip and second electric capacity, be provided with the 4th resistance between described second working power and the described transistor collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202019131U CN202168052U (en) | 2011-06-15 | 2011-06-15 | Multi-power reset circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202019131U CN202168052U (en) | 2011-06-15 | 2011-06-15 | Multi-power reset circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202168052U true CN202168052U (en) | 2012-03-14 |
Family
ID=45803854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202019131U Expired - Lifetime CN202168052U (en) | 2011-06-15 | 2011-06-15 | Multi-power reset circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202168052U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324916A (en) * | 2011-06-15 | 2012-01-18 | 杭州炬华科技股份有限公司 | Multiple-power-supply reset circuit |
-
2011
- 2011-06-15 CN CN2011202019131U patent/CN202168052U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324916A (en) * | 2011-06-15 | 2012-01-18 | 杭州炬华科技股份有限公司 | Multiple-power-supply reset circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203101494U (en) | AC (alternating current) electric supply power failure detection circuit, equipment and system | |
| CN204287446U (en) | A kind of power-fail detection circuit | |
| CN202168052U (en) | Multi-power reset circuit | |
| CN203690888U (en) | Electric leakage protection plug | |
| CN102324916A (en) | Multiple-power-supply reset circuit | |
| CN203688642U (en) | Power failure detection circuit | |
| CN203299321U (en) | Simple electric leakage alarm device for power equipment | |
| CN202889317U (en) | Capacitance type touch key circuit | |
| CN203324355U (en) | Microwave-system diverse self-checking circuit | |
| CN203130575U (en) | Alternating-current fan fault detecting circuit | |
| CN203732605U (en) | Battery voltage detecting circuit | |
| CN206353703U (en) | Battery lamp load short-circuit protection circuit | |
| CN202421457U (en) | Motor over-current detection circuit | |
| CN207007980U (en) | A kind of AC dump detects circuit | |
| CN104579264A (en) | Multi-power-supply reset circuit | |
| CN202979362U (en) | Taillight detection control circuit | |
| CN206339591U (en) | A kind of electrotechnical, electronic surveys electric installation | |
| CN203798896U (en) | Zero crossing detection circuit | |
| CN205335837U (en) | Overvoltage protection circuit | |
| CN205015050U (en) | Water tank detection of water level appearance | |
| CN110912105A (en) | High-low voltage protection circuit for power supply voltage range detection | |
| CN203166854U (en) | Thyristor trigger based on a 555 time-base circuit | |
| CN204405142U (en) | For water level detection circuit and the cooking apparatus of cooking apparatus | |
| CN103683257A (en) | High-reliability electrostatic protection circuit | |
| CN205139833U (en) | Voltage jump detection circuitry , reset circuit and electron device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 310030 No. 9 Longtan Road, front street, Yuhang District, Zhejiang, Hangzhou Patentee after: Hangzhou Sunrise Technology Co., Ltd. Address before: Hangzhou City, Zhejiang province 310030 West Lake science and Technology Park West eight road No. 2 Yinjiang Software Park building C Patentee before: Hangzhou Sunrise Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120314 |
|
| CX01 | Expiry of patent term |