CN102324916A - Multiple-power-supply reset circuit - Google Patents
Multiple-power-supply reset circuit Download PDFInfo
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- CN102324916A CN102324916A CN201110161053A CN201110161053A CN102324916A CN 102324916 A CN102324916 A CN 102324916A CN 201110161053 A CN201110161053 A CN 201110161053A CN 201110161053 A CN201110161053 A CN 201110161053A CN 102324916 A CN102324916 A CN 102324916A
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- triode
- resistance
- voltage checking
- checking chip
- power
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Abstract
The invention discloses a multiple-power-supply reset circuit comprising a voltage detecting chip and a first working power supply for supplying power to the voltage detecting chip, wherein the output end of the voltage detecting chip is connected with the base electrode of a triode; a second capacitor is arranged between the voltage detecting chip and the base electrode of the triode; the emitter electrode of the triode is grounded; the collector electrode of the triode is connected with a second working power supply; a third capacitor is arranged between the collector electrode and the emitter electrode of the triode; a third resistor is arranged between the base electrode and the emitter electrode of the triode; 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 connected with a third resistor. The invention has the advantages of stability in working, low cost and wide range of application.
Description
Technical field
The present invention 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 invention provides and a kind ofly 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.
Technical conceive of the present invention is: when power supply that voltage checking chip detected was low level, the chip output pin connect the NPN transistor base, causes 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 present invention is specially adapted to when power supply switches, need produce in the Electronic Design of reset signal, designs like electric energy meter.The present invention has working stability, and is with low cost, and the advantage of applied range.
Description of drawings
Fig. 1 is a sketch map of the present invention.
Embodiment
With reference to accompanying drawing, further specify the present invention:
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.
Technical conceive of the present invention 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 present invention has working stability, and is with low cost, and the advantage of applied range.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; Protection scope of the present invention should not be regarded as and only limit to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention 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 |
|---|---|---|---|
| CN201110161053A CN102324916A (en) | 2011-06-15 | 2011-06-15 | Multiple-power-supply reset circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110161053A CN102324916A (en) | 2011-06-15 | 2011-06-15 | Multiple-power-supply reset circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102324916A true CN102324916A (en) | 2012-01-18 |
Family
ID=45452598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110161053A Pending CN102324916A (en) | 2011-06-15 | 2011-06-15 | Multiple-power-supply reset circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102324916A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112165246A (en) * | 2020-08-21 | 2021-01-01 | 苏州浪潮智能科技有限公司 | Power supply chip self-restarting device, method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6173436B1 (en) * | 1997-10-24 | 2001-01-09 | Vlsi Technology, Inc. | Standard cell power-on-reset circuit |
| US20030062552A1 (en) * | 2000-09-28 | 2003-04-03 | Hidekazu Takata | Reset apparatus, semiconductor ic apparatus, and semiconductor memory apparatus |
| CN201697948U (en) * | 2010-06-29 | 2011-01-05 | 威胜集团有限公司 | Reset circuit for electric energy meter singlechip |
| CN202168052U (en) * | 2011-06-15 | 2012-03-14 | 杭州炬华科技股份有限公司 | Multi-power reset circuit |
-
2011
- 2011-06-15 CN CN201110161053A patent/CN102324916A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6173436B1 (en) * | 1997-10-24 | 2001-01-09 | Vlsi Technology, Inc. | Standard cell power-on-reset circuit |
| US20030062552A1 (en) * | 2000-09-28 | 2003-04-03 | Hidekazu Takata | Reset apparatus, semiconductor ic apparatus, and semiconductor memory apparatus |
| CN201697948U (en) * | 2010-06-29 | 2011-01-05 | 威胜集团有限公司 | Reset circuit for electric energy meter singlechip |
| CN202168052U (en) * | 2011-06-15 | 2012-03-14 | 杭州炬华科技股份有限公司 | Multi-power reset circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112165246A (en) * | 2020-08-21 | 2021-01-01 | 苏州浪潮智能科技有限公司 | Power supply chip self-restarting device, method and system |
| CN112165246B (en) * | 2020-08-21 | 2022-02-18 | 苏州浪潮智能科技有限公司 | Power supply chip self-restarting device, method and system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120118 |