CN109586698A - A kind of electrification reset circuit - Google Patents
A kind of electrification reset circuit Download PDFInfo
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- CN109586698A CN109586698A CN201811440767.0A CN201811440767A CN109586698A CN 109586698 A CN109586698 A CN 109586698A CN 201811440767 A CN201811440767 A CN 201811440767A CN 109586698 A CN109586698 A CN 109586698A
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
- H03K17/223—Modifications for ensuring a predetermined initial state when the supply voltage has been applied in field-effect transistor switches
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/24—Resetting means
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Abstract
The present invention relates to a kind of high reliability, power-on-reset circuit with low power consumption.The circuit in such a way that Schmidt trigger combines, has area small using comparator compared with previous RC electrification reset circuit, low in energy consumption and repeat to power on high reliablity, and powers on, the performance characteristics such as power down threshold value can be set.Reset circuit of the invention completely solves traditional RC electrification reset circuit due to wanting the wider capacitance that must just increase capacitor of reset pulse, the drawbacks of increasing chip area, solve the problems, such as that capacitance charge cannot release clean immediately when supply voltage drops to zero rapidly, the continuous reset pulse that can be generated to avoid power supply shakiness, the circuit does not use capacitor, when rapid power down powers on, can also effectively be resetted.Circuit simulation is carried out using Hspice software to power on threshold value in supply voltage 3.3V and be set as 3V, power down threshold value is set as 2.8V, and slowly powering on all has good reset effect with very fast power down.
Description
Technical field
The present invention relates to integrated circuit fields, specifically a kind of electrification reset circuit.
Background technique
In integrated circuit fields, either in digital integrated electronic circuit or in hydrid integrated circuit, reset circuit is all used,
Such as trigger, register circuit, circuit is in power up, since digital circuit power source is extremely unstable, in this period
In digital circuit logic entanglement, error-logic is also easy to produce, so digital circuit powers on later initial stage and needs a determination
State, i.e. cleared condition, this just needs the very good electrification reset circuit of a performance.Electrification reset circuit is needed in power supply
A reset pulse is generated after stablizing, such internal system digital circuit carries out sufficiently reliable multiple by this reset pulse
Position.In addition to this one electrification reset circuit of good performance should also have repetition to power on can also be with the performance of active homing.
Microelectronics industry is risen in the 1950s, having gone through the fast development of over half a century so far, deeply
Change the looks of society.As integrated circuit fabrication process is constantly promoted, the manufacture size of integrated circuit is smaller and smaller, this is wanted
Electrification reset circuit occupied area is asked also to reduce, resetting reliability will also improve, and tradition RC reset is unable to satisfy requirement, is
Extension resetting time, biggish capacitor is needed to extend resetting time, this will occupy very big chip area, can not adapt to existing
The requirement of foundry skill, and the design is in such a way that comparator is combined with Schmidt trigger, it can be excessive to avoid using
Chip area, reseting pulse width necessary to can also extending and reduction power consumption.
Summary of the invention
For above-mentioned deficiency in the prior art, the present invention provides a kind of novel electrification reset circuits, completely solve
Traditional RC electrification reset circuit, if it is desired to the wider capacitance that must just increase capacitor of reset pulse, the area of such domain
It will increase, when supply voltage drops to zero rapidly, capacitance charge cannot release completely immediately, and circuit can not when power supply powers at this time
Lead to the problem of the various of reseting pulse signal.
Present invention technical solution used for the above purpose is: a kind of electrification reset circuit, comprising:
Power vd D is successively grounded after resistance R1, resistance R2, resistance R3, and the node B between resistance R1, resistance R2 connects
The source electrode of MOS switch pipe M2 is connect, the source electrode of the node A connection MOS switch pipe M1 between resistance R2, resistance R3, MOS switch pipe M1
Drain electrode, MOS switch pipe M2 drain electrode be separately connected the inverting input terminal of comparator C, the non-inverting input terminal of comparator C connects ginseng
Examine voltage V1D2, the output end of comparator C successively passes through Schmidt trigger INV1, phase inverter INV2 output signal VO, and MOS is opened
The grid for closing pipe M2 is also connected with the output end of Schmidt trigger INV1, and the grid of MOS switch pipe M1 is also connected with phase inverter INV2
Output end.
By the ratio of setting resistance R1, resistance R2, resistance R3, adjusting powers on threshold value and power down threshold value.
In 3.3V power-supply system, if setting powers on threshold value 3V, power down threshold value 2.8V, A point is to 1.2V when powering on, then following formula
It sets up:
Take R3=1.2M Ω, according to formula (1) R1+R2=1.8M Ω, all-in resistance R1+R2+R3=3M Ω, B point when power down
To 1.2V, then following formula is set up:
R1=1.714M Ω, R2=85.7K Ω are solved by formula (2).
The invention has the following beneficial effects and advantage:
1. reset circuit of the invention completely solves traditional RC electrification reset circuit, wider due to wanting reset pulse
The drawbacks of capacitance of capacitor must just be increased, increase chip area.
2. being completely solved without using capacitor when supply voltage drops to zero rapidly in reset circuit of the invention, capacitor electricity
Lotus cannot release clean problem immediately, and circuit can generate reseting pulse signal when power supply powers at this time.
3. the continuous reset pulse that reset circuit of the invention can generate to avoid power supply shakiness.
4. reset circuit of the invention does not use capacitor, when rapid power down powers on, can also effectively be resetted.
Detailed description of the invention
Fig. 1 is electrification reset circuit of the invention；
Fig. 2 is electrification reset specific embodiment circuit of the invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and embodiments.
As shown in Figure 1, being electrification reset circuit of the invention.Power vd D successively passes through resistance R1, resistance R2, resistance R3
After be grounded, the source electrode of the node B connection metal-oxide-semiconductor M2 between resistance R1, resistance R2, the node A connection between resistance R2, resistance R3
The source electrode of MOS switch pipe M1, the reverse phase that the drain electrode of MOS switch pipe M1, the drain electrode of MOS switch pipe M2 are separately connected comparator C are defeated
Enter end, the non-inverting input terminal of comparator C connects reference voltage V1D2, and the output end of comparator C successively passes through Schmidt trigger
INV1, phase inverter INV2 output signal VO, the grid of MOS switch pipe M2 are also connected with the output end of Schmidt trigger INV1, MOS
The grid of switching tube M1 is also connected with the output end of phase inverter INV2.
Circuit main design idea is that the reference of comparator C is generated by band-gap reference module when supply voltage is relatively low
Voltage V1D2, at this moment comparator C, which has been started up, can work normally, when supply voltage is normal, that is, exportable reset pulse.
Circuit simulation is carried out using Hspice software to power on threshold value in supply voltage 3.3V and be set as 3V, power down threshold value
It is set as 2.8V, slowly powering on all has good reset effect with very fast power down.
It is that difference prevention is big in comparator C portion M10, M11 as shown in Fig. 2, being electrification reset embodiment detailed circuit diagram
Circuit, decision circuitry compared with M7, M8 are constituted with M14, M15, wherein the grid of M8 and M14 are connected with each other the leakage of other side, form part
Positive feedback, improves the comparison speed of comparator C, and the result after comparison is supplied to Schmidt trigger INV1, Schmidt's touching by M18
It sends out device INV1 output end and connects phase inverter INV2, phase inverter INV2 controls MOS switch pipe M1, M2 on-off and realizes circuit function.
The source electrode of M28 meets VDD in comparator C, and the source electrode of M29 meets VDD, and the drain electrode of the grid and M28 of M28, M29 connects the end IB
Mouthful, the drain electrode of M29 connects the drain and gate of M3, and the source electrode of M3 connects the drain electrode of M4, and the source electrode of M4 connects the drain electrode of M5, and the source electrode of M5 connects
The grid of GND, M4, M5 connect the grid of M3.The source electrode of M12 meets VDD, and the drain electrode of M12 connects the source electrode of M10, M11, and the grid of M12 connects
The port IB, the grid of M10 meet reference voltage V1D2, and the drain electrode of M10 connects the drain electrode of M6, M9, and M6 source electrode connects the drain electrode of M7, the grid of M6
Pole connects the grid of M3, and the grid of M7 connects the drain electrode of M6, and the source electrode of M7 meets GND, and the source electrode of M9 connects the drain electrode of M8, and the grid of M9 meets M6
Grid, the grid of M8 connects the drain electrode of M11, and the source electrode of M8 meets GND, and the drain electrode of M11 connects the drain electrode of M13, in the gate switch of M11
The drain electrode of the source electrode and M2 of M1, the grid of M13 connect the grid of M3, and the source electrode of M13 connects the drain electrode of M14, and the grid of M14 connects M10's
Drain electrode, the drain electrode of M14 meet GND, and the source electrode of M19 meets VDD, and the grid of M19 meets port IB, and the drain electrode of M19 meets the drain electrode of M17, M17
Source electrode connect the drain electrode of M18, the grid of M17 connects the grid of M3, and the grid of M18 connects the drain electrode of M10, and the source electrode of M18 meets GND, M17
Drain electrode with M19 is that the output of comparator connects the grid of M20, M21, M22 and M23 in Schmidt trigger.
The grid of M20, M21, M22 and M23 in Schmidt trigger INV1 connect the output of comparator, and the source electrode of M20 connects
The drain electrode of VDD, M20 connect the source electrode of M21, the drain electrode of M21 connect the drain electrode of M22, connect M24 and M25 grid (Schmidt trigger
Output), in phase inverter M26 and M27 grid, the source electrode of M22 connects the drain electrode of M23, and the source electrode of M23 meets GND, and the source electrode of M24 connects
The drain electrode of M20, the drain electrode of M24 meet GND, and the source electrode of M25 connects the drain electrode of M23, and the drain electrode of M25 meets VDD.
The grid of M26 and M27 connects the drain electrode of M21 and M22 in Schmidt trigger in phase inverter INV2, and the source electrode of M26 connects
The drain electrode of VDD, M26 connect the drain electrode of M27, and the source electrode of M27 connects the drain electrode of GND, M26 and M27 and connects switching tube M1's for output VO, VO
Grid, the drain electrode of M1 meet port A, and the drain electrode of the source electrode and M2 of M1 connects the grid of M11 in comparator, and the grid of M2 connects phase inverter
The grid of M26 and M27, the source electrode of M2 meet port B.
Electrification reset working principle is as follows:
When VDD rises, the conducting of M1 pipe is by A point current potential compared with V1D2, and A point current potential is lower than V1D2 at this time, and comparator C is defeated
It is out high level, output voltage VO follows VDD to change.When VDD rises to voltage source, A point current potential is higher than V1D2, comparator C
Low level is exported, realizes the overturning of VO current potential.When VDD decline, the conducting of M2 pipe is by B point current potential compared with V1D2, and B point is electric at this time
Position is higher than V1D2, and comparator C output still maintains low level, and output voltage VO is low level.Keep B point current potential low when VDD drops to
Low level is exported in V1D2, comparator C, realizes the overturning of VO current potential.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (3)
1. a kind of electrification reset circuit, characterized by comprising:
Power vd D is successively grounded after resistance R1, resistance R2, resistance R3, the node B connection MOS between resistance R1, resistance R2
The source electrode of switching tube M2, the source electrode of the node A connection MOS switch pipe M1 between resistance R2, resistance R3, the leakage of MOS switch pipe M1
The drain electrode of pole, MOS switch pipe M2 is separately connected the inverting input terminal of comparator C, and the non-inverting input terminal connection of comparator C is with reference to electricity
V1D2 is pressed, the output end of comparator C successively passes through Schmidt trigger INV1, phase inverter INV2 output signal VO, MOS switch pipe
The grid of M2 is also connected with the output end of Schmidt trigger INV1, and the grid of MOS switch pipe M1 is also connected with the defeated of phase inverter INV2
Outlet.
2. a kind of electrification reset circuit described in accordance with the claim 1, which is characterized in that by the way that resistance R1, resistance R2, electricity is arranged
The ratio of R3 is hindered, adjusting powers on threshold value and power down threshold value.
3. a kind of electrification reset circuit according to claim 2, which is characterized in that in 3.3V power-supply system, if setting
Threshold value 3V, power down threshold value 2.8V are powered on, A point is to 1.2V when powering on, then following formula is set up:
Take R3=1.2M Ω, according to formula (1) R1+R2=1.8M Ω, all-in resistance R1+R2+R3=3M Ω, B point arrives when power down
1.2V, then following formula is set up:
R1=1.714M Ω, R2=85.7K Ω are solved by formula (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811440767.0A CN109586698A (en) | 2018-11-29 | 2018-11-29 | A kind of electrification reset circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811440767.0A CN109586698A (en) | 2018-11-29 | 2018-11-29 | A kind of electrification reset circuit |
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| CN109586698A true CN109586698A (en) | 2019-04-05 |
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| CN201811440767.0A Pending CN109586698A (en) | 2018-11-29 | 2018-11-29 | A kind of electrification reset circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110868199A (en) * | 2019-11-04 | 2020-03-06 | 宁波大学 | Go up long time delay protection circuit |
| CN115765699A (en) * | 2022-12-16 | 2023-03-07 | 上海功成半导体科技有限公司 | Reset circuit, reset method, reset switch circuit and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090102516A1 (en) * | 2007-09-19 | 2009-04-23 | Yamaha Corporation | Comparator |
| CN102291109A (en) * | 2011-04-18 | 2011-12-21 | 烽火通信科技股份有限公司 | Power-on reset circuit of digital integrated circuit supplied with power by chip internal regulator |
| CN102403988A (en) * | 2011-12-22 | 2012-04-04 | 中国科学院上海微系统与信息技术研究所 | Power on reset circuit |
| CN104682931A (en) * | 2015-02-12 | 2015-06-03 | 北海市蕴芯电子科技有限公司 | Voltage-adjustable power-on and power-failure reset circuit |
| CN106647917A (en) * | 2016-12-02 | 2017-05-10 | 电子科技大学 | Temperature hysteresis protection circuit for intelligent power chip |
-
2018
- 2018-11-29 CN CN201811440767.0A patent/CN109586698A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090102516A1 (en) * | 2007-09-19 | 2009-04-23 | Yamaha Corporation | Comparator |
| CN102291109A (en) * | 2011-04-18 | 2011-12-21 | 烽火通信科技股份有限公司 | Power-on reset circuit of digital integrated circuit supplied with power by chip internal regulator |
| CN102403988A (en) * | 2011-12-22 | 2012-04-04 | 中国科学院上海微系统与信息技术研究所 | Power on reset circuit |
| CN104682931A (en) * | 2015-02-12 | 2015-06-03 | 北海市蕴芯电子科技有限公司 | Voltage-adjustable power-on and power-failure reset circuit |
| CN106647917A (en) * | 2016-12-02 | 2017-05-10 | 电子科技大学 | Temperature hysteresis protection circuit for intelligent power chip |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110868199A (en) * | 2019-11-04 | 2020-03-06 | 宁波大学 | Go up long time delay protection circuit |
| CN110868199B (en) * | 2019-11-04 | 2023-12-22 | 西安恒松阳电气有限公司 | Power-on long time delay protection circuit |
| CN115765699A (en) * | 2022-12-16 | 2023-03-07 | 上海功成半导体科技有限公司 | Reset circuit, reset method, reset switch circuit and electronic equipment |
| CN115765699B (en) * | 2022-12-16 | 2023-11-17 | 上海功成半导体科技有限公司 | Reset circuit, reset method, reset switch circuit and electronic equipment |
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