CN107769762A - Extremely low power dissipation Hall switch - Google Patents
Extremely low power dissipation Hall switch Download PDFInfo
- Publication number
- CN107769762A CN107769762A CN201711284191.9A CN201711284191A CN107769762A CN 107769762 A CN107769762 A CN 107769762A CN 201711284191 A CN201711284191 A CN 201711284191A CN 107769762 A CN107769762 A CN 107769762A
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- Prior art keywords
- hall switch
- hall
- low
- power dissipation
- resting state
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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
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/90—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of galvano-magnetic devices, e.g. Hall-effect devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0036—Means reducing energy consumption
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- Electronic Switches (AREA)
- Hall/Mr Elements (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The present invention relates to a kind of extremely low power dissipation Hall switch, when Hall switch enters resting state, timing is carried out with low-frequency oscillator and timer, produces signal, cuts off the electric current of Hall sensor, chopper amplifier, hysteresis control circuit, latch and high-frequency generator in the dormant state.The low-frequency oscillator has the characteristics of quiescent current is small, and the cycle is long.After timing is to certain stipulated time, signal changes state, Hall switch is entered working condition.After latch pins the output of hysteresis control circuit, SECO output signal makes timer restart timing, and Hall switch enters resting state.Consumption electric current under resting state directly decides the size of Hall switch average consumed cur-rent.Only having under Hall switch resting state in low-frequency oscillator has quiescent current, and the electric current is small arrives na rank, therefore compared with prior art, the present invention substantially reduces the average current of Hall switch, and power consumption can drop to less than 1/10th of existing low-power consumption Hall switch.
Description
Technical field
The present invention relates to electricity field, more particularly to Hall switch field, in particular to a kind of extremely low power dissipation Hall switch.
Background technology
Such Hall switch reduces average operating current by low-work voltage, and by the working method of internal timing
Principle reduces average power consumption.
Reference picture 1, the implementation of existing low-power consumption Hall switch is illustrated.
A time switch 208 is carried inside Hall switch, with the rising edge triggering timing of high-frequency generator 207, produces one
201 signals of fixed duty cycle.Specifically, the cycle time for setting 201 signals is Tonoff, high level time occupies Ton, it is low
Level time occupies Toff.In TonIn time, Hall switch is in running order, and Hall sensor 202 believes the magnetic field applied
Hall voltage signal number is proportionally converted into, then amplifies Hall voltage signal by chopper amplifier 203 and eliminates due to temperature
Imbalance caused by degree, technique, mechanical stress etc., finally in hysteresis control circuit 204, the Hall voltage signal after amplification is passed
Enter the hysteresis comparator after adjusting that disappears, carry out sluggish comparison with the threshold voltage of setting, determine whether output switch changes state,
And pin output latch 206, make the output of Hall switch can maintain the original state in the dormant state.In ToffTime
It is interior, Hall switch in a dormant state, 201 signals be low level cut off including Hall sensor 202, chopper amplifier 203,
Current path in hysteresis control circuit 204, all output zero setting of SECO 205, latch 206 keep preceding output state,
Only have high-frequency generator 207 and the normal work of timer 208 in Hall switch.
As shown in Fig. 2 SECO 205 is only in TonNormal work in time, in ToffIn time in a dormant state.It is high
Frequency oscillator 207 and time switch 208 are in whole TonoffAll it is normal work in cycle.General TonThe setting time is nanosecond
Rank, ToffFor millisecond rank.Therefore, it is desirable to obtain relatively low average power consumption, key is the quiescent current for reducing dormancy period
Ioff, the place that quiescent current is produced in dormancy time is high-frequency generator 207.Existing low-power consumption Hall switch average current
About in 2uA or so, wherein the quiescent current of high-frequency generator is just in more than 1uA.
The content of the invention
The purpose of the present invention is the shortcomings that overcoming above-mentioned prior art, there is provided a kind of power consumption is lower, overcomes resting state
The extremely low power dissipation Hall switch for the problem of lower high-frequency generator also needs to work on and causes Hall switch power consumption high.
In order to realize above-mentioned purpose, extremely low power dissipation Hall switch of the invention is specific as follows：
The extremely low power dissipation Hall switch, including resting state and working condition, and the Hall switch includes high-frequency generator
And SECO, and under the working condition of the Hall switch, Hall member is provided by described high-frequency generator and SECO
Clock signal needed for part, it is mainly characterized by, and under resting state, the stipulated time is provided for the Hall switch by a timer
Sleep signal, the Hall switch terminates resting state after timing to stipulated time, and is that the timer carries by a low-frequency oscillator
For low-frequency clock signal.
It is preferred that described timer is triggered by the output of low-frequency oscillator.
It is preferred that under described working condition, described timer is in a dormant state.
It is preferred that the static working current of described low-frequency oscillator is na rank.
It is preferred that described low-frequency oscillator normal work only under the resting state of Hall switch.
It is preferred that described low-frequency oscillator equal normal work under the working condition of Hall switch and under resting state.
It is preferred that described high-frequency generator provides high frequency clock signal for SECO, described SECO provides
Clock signal needed for the Hall element.
Using the extremely low power dissipation Hall switch, only low-frequency oscillator produces quiescent current in the dormant state, and low frequency
The quiescent current of oscillator can accomplish na rank, therefore compared with prior art, extremely low power dissipation Hall switch of the invention is big
The big average current for reducing Hall switch, power consumption can even drop to existing low-power consumption Hall switch 1/10th and it is following.
Brief description of the drawings
Fig. 1 is the implementation schematic diagram of existing low-power consumption Hall switch.
Fig. 2 is the working waveform figure of existing low-power consumption Hall switch.
Fig. 3 is the implementation schematic diagram of the extremely low power dissipation Hall switch of the present invention.
Fig. 4 is the working waveform figure of the extremely low power dissipation Hall switch of the present invention.
Reference
201 outputs
202 Hall sensors
203 chopper amplifiers
204 hysteresis control circuits
205 SECO
206 latch
207 high-frequency generators
208 time switches
301 outputs
302 Hall sensors
303 chopper amplifiers
304 hysteresis control circuits
305 SECO
306 latch
307 high-frequency generators
308 low-frequency oscillators
309 timers
Embodiment
In order to be more clearly understood that this practical technique content, described in detail especially exemplified by following examples.
The extremely low power dissipation Hall switch, including resting state and working condition, and the Hall switch includes high-frequency generator
And SECO, and under the working condition of the Hall switch, Hall member is provided by described high-frequency generator and SECO
Clock signal needed for part, and in the dormant state, the sleep signal of stipulated time is provided for the Hall switch by a timer,
Timing terminates resting state to the Hall switch after the stipulated time, and provides low-frequency clock by a low-frequency oscillator for the timer
Signal.
In a kind of preferably embodiment, described timer is triggered by the output of low-frequency oscillator.
In a kind of preferably embodiment, under described working condition, described timer is in a dormant state.
In a kind of preferably embodiment, the static working current of described low-frequency oscillator is na rank.
In a kind of preferably embodiment, described low-frequency oscillator normal work only under the resting state of Hall switch
Make.
A kind of preferably in embodiment, described low-frequency oscillator is under the working condition of Hall switch and dormancy shape
Equal normal work under state.
In a kind of preferably embodiment, described high-frequency generator provides high frequency clock signal for SECO, institute
The SECO stated provides the clock signal needed for the Hall element.
Referring to Fig. 3, in a kind of specific embodiment, the Hall switch includes Hall sensor 302, chopper amplifier
303rd, hysteresis control circuit 304, latch 306, SECO 305, timer 309, high-frequency generator 307 and low-frequency oscillator
308.Wherein, Hall sensor 302 is used to the magnetic field signal applied being proportionally converted into Hall voltage signal；Copped wave is put
Big device 303 is used for the offset voltage for eliminating Hall voltage signal and the Hall voltage signal after adjusting that will disappear is amplified；It is sluggish
Control circuit 304 is used for the incoming hysteresis comparator after adjusting that disappears of the Hall voltage signal after amplification, and with the threshold value of setting
Voltage carries out sluggish comparison；Latch 306 is used to pin the output result of hysteresis comparator circuit, the output of Hall switch is existed
Be locked in dormancy time its it is previous in the state of；SECO 305 is used for for Hall sensor 302, chopper amplifier
303rd, hysteresis control circuit 304 and latch 306 provide required every clock signal；It is Hall switch that timer 309, which is used for,
The sleep signal of stipulated time is provided；High-frequency generator 307 is used to provide high frequency clock signal for SECO 305；Low frequency shakes
Swing device 308 and be used to be the offer low-frequency clock signal of timer 309.
Under Hall switch working condition, in a dormant state, 301 signals of output is high to timer 309, Hall sensor
302nd, chopper amplifier 303, hysteresis control circuit 304,307 normal work of latch 306, SECO 305 and high-frequency generator
Make, Hall sensor 302 senses Hall voltage；Chopper amplifier 303 disappear reconciling to Hall voltage to be amplified；Processing is tied
Fruit is input to hysteresis control circuit 304 and is compared.After hysteresis control circuit 304 is disposed, latch 306 can be output it
As a result pin.After latch 306 pins the output of hysteresis control circuit 304, start the signal of timing to timer 309,
Change into the signal of output 301 low, cut-out is included in Hall sensor 302, chopper amplifier 303, hysteresis control circuit 304
Current path, all output zero setting of SECO 305, latch 306 keep preceding output state, only have low frequency to shake in Hall switch
Device 308 and timer 309 are swung in normal work.Timer 309 is triggered with the rising edge of the output signal of low-frequency oscillator 308,
After timing is to setting, 301 signals of output change into height, terminate timing, and timer enters resting state, and Hall switch terminates
Resting state, into normal operating conditions.
As shown in figure 4, the Hall switch a cycle time is set as Tonoff, the working condition time is Ton, the resting state time
For Toff。TonTime handles magnetic field signal required time by Hall switch and determined, ToffTime is by low-frequency oscillator output signal
Cycle and timer internal logic determine.In a TonoffIn cycle, Hall switch switches between resting state and working condition,
That is timer and SECO alternation, timer are responsible for controlling the dormancy time of Hall switch, and Hall is responsible in SECO
Every clock signal needed for the normal work of switch and provide start-up operation signal for timer.In ToffPeriod, only low frequency
Oscillator produces quiescent current, because output is low frequency signal, can set quiescent current and arrive na rank, such as one to 200 receive
Peace, greatly reduces the electric current consumed under resting state and then greatly reduces the average current of Hall switch, with existing low work(
The average current of consumption Hall switch, which is compared, can accomplish original 1/10th and less, greatly reduce the work(of such Hall switch
Consumption.
In this embodiment, the only normal work under Hall switch resting state may be selected in low-frequency oscillator 308, also can be
Normal work always in whole cycle.Because in Hall switch normal work, the quiescent current of low-frequency oscillator is with Hall switch
Quiescent current compared to negligible, and now timer has been resting state, thus low-frequency oscillator can dormancy can not
Dormancy.
In summary, by the present invention, the average current of Hall switch can be substantially reduced, power consumption can drop to existing low work(
Consume Hall switch 1/10th and it is following.
Using the extremely low power dissipation Hall switch, only low-frequency oscillator produces quiescent current in the dormant state, and low frequency
The quiescent current of oscillator can accomplish na rank, therefore compared with prior art, extremely low power dissipation Hall switch of the invention is big
The big average current for reducing Hall switch, power consumption can even drop to existing low-power consumption Hall switch 1/10th and it is following.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that it can still make
Various modifications and alterations are without departing from this practical spirit and scope.Therefore, specification and drawings be considered as it is illustrative and
It is nonrestrictive.
Claims (7)
1. a kind of extremely low power dissipation Hall switch, including resting state and working condition, and the Hall switch includes high-frequency generator
And SECO, and under the working condition of the Hall switch, Hall member is provided by described high-frequency generator and SECO
Clock signal needed for part, it is characterised in that under resting state, stopping for stipulated time is provided for the Hall switch by a timer
Dormancy signal, the Hall switch terminates resting state after timing to stipulated time, and is provided by a low-frequency oscillator for the timer
Low-frequency clock signal.
2. extremely low power dissipation Hall switch according to claim 1, it is characterised in that described timer is by low-frequency oscillator
Output triggering.
3. extremely low power dissipation Hall switch according to claim 1, it is characterised in that described under described working condition
Timer is in a dormant state.
4. extremely low power dissipation Hall switch according to claim 1, it is characterised in that the static work of described low-frequency oscillator
It is na rank to make electric current.
5. extremely low power dissipation Hall switch according to claim 1, it is characterised in that described low-frequency oscillator is only in Hall
Normal work under the resting state of switch.
6. extremely low power dissipation Hall switch according to claim 1, it is characterised in that described low-frequency oscillator is opened in Hall
Under the working condition of pass and resting state under equal normal work.
7. extremely low power dissipation Hall switch according to claim 1, it is characterised in that described high-frequency generator is sequential control
System provides high frequency clock signal, and described SECO provides the clock signal needed for the Hall element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711284191.9A CN107769762A (en) | 2017-12-07 | 2017-12-07 | Extremely low power dissipation Hall switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711284191.9A CN107769762A (en) | 2017-12-07 | 2017-12-07 | Extremely low power dissipation Hall switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107769762A true CN107769762A (en) | 2018-03-06 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711284191.9A Pending CN107769762A (en) | 2017-12-07 | 2017-12-07 | Extremely low power dissipation Hall switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109698687A (en) * | 2019-02-25 | 2019-04-30 | 成都芯进电子有限公司 | A kind of magnetic signal detection sequential control circuit and control method |
| CN113485510A (en) * | 2021-07-09 | 2021-10-08 | 绍兴光大芯业微电子有限公司 | System for realizing time-sharing work of vertical Hall sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109698687A (en) * | 2019-02-25 | 2019-04-30 | 成都芯进电子有限公司 | A kind of magnetic signal detection sequential control circuit and control method |
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| CN113485510A (en) * | 2021-07-09 | 2021-10-08 | 绍兴光大芯业微电子有限公司 | System for realizing time-sharing work of vertical Hall sensor |
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Application publication date: 20180306 |