CN207181438U - Hall sensor circuit - Google Patents
Hall sensor circuit Download PDFInfo
- Publication number
- CN207181438U CN207181438U CN201720664670.2U CN201720664670U CN207181438U CN 207181438 U CN207181438 U CN 207181438U CN 201720664670 U CN201720664670 U CN 201720664670U CN 207181438 U CN207181438 U CN 207181438U
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- China
- Prior art keywords
- diode
- sensor circuit
- hall sensor
- pin
- electric capacity
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Abstract
The utility model discloses a kind of Hall sensor circuit, it has the rotor of rotating speed to measure its rotating speed to be installed on one, the Hall sensor circuit includes a Hall element, the Hall element includes the first pin of one power supply of connection, the second pin of one electrical ground and the 3rd pin as waveform output end, 3rd pin is electrically connected with a clamp circuit, the clamp circuit includes one first electric capacity, one the first diode connected with first electric capacity and the first resistor with first diodes in parallel, output end of the one end being electrically connected with first electric capacity of the first resistor as Hall sensor circuit, the other end electrical ground of the first resistor.Clamp circuit is added in the peripheral processes circuit of Hall element of the present utility model, according to environmental demand Hall waveform can be made to produce potential shift.
Description
【Technical field】
The utility model is espespecially a kind of to carry out motor speed using with Hall element about a kind of Hall sensor circuit
The Hall sensor circuit of test.
【Background technology】
Hall element is the semiconductor using Hall effect, is generally used for determining the rotating speed of rotor, such as video recorder in motor
Magnetic drum, the rotating speed of the radiator fan in computer.Hall element is a kind of Magnetic Sensor based on Hall effect, has evolved into one
Individual Magnetic Sensor product family numerous in variety, and be widely used.The peripheral circuit of current most of Hall elements is all
It is the file with reference to producer, adds a pull-up resistor (as shown in Figure 1) in Hall element output end, this circuit real surface reaches
Hall element receives caused pulse signal waveform.But as products application, for the interference on power circuit, the periphery
Circuit then lacks disposal ability.In addition for the use occasion of part, it is desirable to raise low level or reduce high level, then without
Method is normally handled.
Therefore, it is of the prior art above-mentioned scarce to solve it is necessory to be improved to traditional or Hall sensor circuit
Fall into.
【Utility model content】
Main purpose of the present utility model is to provide a kind of survey rotational speed devices that can be applied with a variety of occasions.
To achieve these goals, the utility model Hall sensor circuit adopts the following technical scheme that：A kind of Hall passes
Sensor circuit, it has the rotor of rotating speed to measure its rotating speed to be installed on one, and the Hall sensor circuit includes one suddenly
That element, the Hall element include connecting the first pin of a power supply, the second pin of an electrical ground and are used as waveform defeated
Go out the 3rd pin at end, the 3rd pin is electrically connected with a clamp circuit, the clamp circuit include one first electric capacity, one with
First diode of first electric capacity series connection and the first resistor with first diodes in parallel, the first resistor with
Output end of the one end that first electric capacity is electrically connected with as Hall sensor circuit, the other end of the first resistor are electrical
Ground connection.
Further, the 3rd pin of the negative pole access Hall element of first electric capacity, the positive pole electricity of first electric capacity
Property the connection diode one end.
Further, the positive pole of first electric capacity is electrically connected with the negative pole of first diode, first diode
Negative pole electrical ground, the clamp circuit is positive clamp circuit.
Further, the positive pole of first electric capacity is electrically connected with the positive pole of first diode, first diode
Positive pole electrical ground, the clamp circuit is negative clamp circuit.
Further, the Hall sensor circuit also includes a pull-up resistor, and one end of the pull-up resistor is electrically connected with
Power supply, the other end of the pull-up resistor are electrically connected with the 3rd pin of the Hall element.
Further, the Hall sensor circuit also includes a filter capacitor, and one end of the filter capacitor is electrically connected with
3rd pin of the Hall element, the other end electrical ground of the filter capacitor.
Further, the clamp circuit also includes a reference voltage, the reference voltage and first Diode series,
Second diode and the reference voltage are in parallel with the first resistor.
Further, the power supply includes power supply chip, and the power supply chip includes an output pin and a grounding pin.
Further, the output pin of the power supply is electrically connected with the positive pole of one the 3rd diode, the 3rd diode
Output end of the negative pole as power supply.
Further, one the 3rd electric capacity is accessed between the negative pole of the 3rd diode and the grounding pin.
Compared with prior art, clamp circuit is added in the peripheral processes circuit of Hall element of the present utility model, can be with
According to environmental demand, Hall waveform is set to produce potential shift.
【Brief description of the drawings】
Fig. 1 is the peripheral circuit schematic diagram of Hall element in the prior art.
Fig. 2 is the circuit diagram of the utility model Hall sensor circuit.
Fig. 3 is the positive clamp circuit schematic diagram of the utility model Hall sensor circuit.
Fig. 4 is the Waveform Input figure of the utility model Hall sensor circuit.
Fig. 5 is the waveform output figure of the positive clamp circuit of the utility model Hall sensor circuit.
Fig. 6 is the negative clamp circuit schematic diagram of the utility model Hall sensor circuit.
Fig. 7 is the waveform output figure of the negative clamp circuit of the utility model Hall sensor circuit.
Fig. 8 is that reverse biased type bears clamp circuit schematic diagram.
Fig. 9 is that forward bias die mould bears clamp circuit schematic diagram.
Figure 10 is the output waveform figure that reverse biased type bears clamp circuit.
Figure 11 is the output waveform figure that forward bias die mould bears clamp circuit.
Figure 12 is the positive clamp circuit schematic diagram of forward bias die mould.
Figure 13 is the positive clamp circuit schematic diagram of reverse biased type.
Figure 14 is the output waveform figure of the positive clamp circuit of forward bias die mould.
Figure 15 is the output waveform figure of the positive clamp circuit of reverse biased type.
Figure 16 is the oscillogram that input waveform is sine wave.
Figure 17 is that clamp circuit output waveform figure is born when input waveform is sine wave.
Figure 18 is positive clamp circuit output waveform figure when input waveform is sine wave.
Figure 19 is the power circuit schematic diagram of the utility model Hall sensor circuit.
【Embodiment】
Fig. 2 is refer to, the utility model Hall sensor circuit includes an institute of 10 and one clamp circuit of Hall element 20.
Stating Hall sensor circuit also includes a pull-up resistor R2 and a filtration module 30. in the present embodiment, the filtration module
30 only simply use a filter capacitor C2, and the waveform that can be exported to Hall element 10 plays further filter action, with
Handle some spikes, burr signal in waveform.The capacitance of the filter capacitor C2 is usually no more than 10nF.On the other hand, filter
Electric capacity C2 and pull-up resistor R2 size, the time of rising edge in Hall waveform will be also influenceed, and relation therebetween is in just
The relation of ratio.
Fig. 3 and Fig. 6 is refer to, the operation principle of the following clamp circuit of narration in detail.The clamp circuit 20 includes one the
One electric capacity C, a first diode D and with first resistor R.The cathode and anode directions of the first diode D, can determine the pincers
The positive clamper (waveform moves up) that act as of position circuit 20 is also negative clamper (waveform moves down).(T is it should be noted that RC >=5T
Input signal cycle).
Fig. 3 is positive clamp circuit 20a.The waveform Vi positive input terminals of the negative pole access Hall element 10 of the first electric capacity C
Vi+, the first electric capacity C positive pole are electrically connected with the negative pole of the first diode D, the positive pole electricity of the first diode D
Property the connection Hall element 10 waveform Vi negative input end Vi-, the first resistor R is in parallel with the first diode D, institute
State first resistor R positive output end Vo+ and negative output terminal Vo- of the both ends respectively as waveform Vo.As Vi Waveform Inputs such as Fig. 4,
When Vi is in negative half period, the first diode D conductings, the first electric capacity C charges up to reaching V values, as VC=V,
Now Vo=0V.When Vi waveforms are in positive half cycle suddenly, the first diode D is not turned on, and V0=VC+Vi=2V. is finally passed through
By positive output waveform Vo such as Fig. 5 of clamp circuit 20.
Fig. 6 is refer to, Fig. 6 is that negative clamp circuit 20b, the first electric capacity C negative pole access the waveform of Hall element 10
Positive input terminal Vi+, the first electric capacity C positive pole is electrically connected with the positive pole of the first diode D, the one the second pipe D
Negative pole be electrically connected with waveform the negative input end Vi-, the first resistor R of the Hall element 10 and the first diode D
Parallel connection, the positive output end Vo+ and negative output terminal Vo- of the both ends of the first resistor R respectively as waveform Vo.As Waveform Input Vi
Such as Fig. 4, when Vi is in positive half cycle, the first diode D conductings, the first electric capacity C chargings are until reach V values, as
VC=-V, now Vo=0V.When Vi waveforms are in negative half period suddenly, the first diode D is not turned on, V0=VC+Vi=-
2V. is finally via negative output waveform Vo such as Fig. 7 of clamp circuit 20.
Shown clamp circuit 20 increases by one and institute in addition in addition to first resistor R, the first diode D, the first electric capacity C
State the first reference voltage V1 of the first diode D series connection.Now, the first diode D and the first reference voltage V1 goes here and there
Connection, the first resistor R are in parallel with the first diode D and the first reference voltage V1.
Fig. 8 show reverse biased type negative clamp circuit 20c, Fig. 9 and show the negative clamp circuit 20d of forward bias die mould.
It is described when the positive pole of the first reference voltage V1 is electrically connected with the negative pole of the first diode D in negative clamp circuit 20
Negative clamp circuit is that reverse biased type bears clamp circuit 20c.When the negative pole of the first reference voltage V1 is electrically connected with described the
During one diode D negative pole, the negative clamp circuit is that forward bias die mould bears clamp circuit 20d.
Figure 10 show the oscillogram that reverse biased type bears clamp circuit 20c output waveforms Vo, and Figure 11 show forward bias
Die mould bears clamp circuit 20d output waveform Vo oscillogram.The output waveform of negative clamp circuit 20c reverse biased type circuit
Vo deviates V1 on the basis of original minus clamp circuit 20b output waveform Vo (as shown in Figure 7) to positive direction of principal axis.At Vi
When positive half cycle, the first diode D conductings, the first electric capacity C charges up to reaching V values, as VC=-V, now Vo
=+V1.When waveform Vi is in negative half period suddenly, the first diode D is not turned on, and Vo=VC+Vi+V1=-2V+V1. is final
Via negative clamp circuit 20c outputs Vo waveform such as Figure 10.The output waveform Vo of negative clamp circuit 20d forward bias die mould circuit
Deviate V1 to negative direction of principal axis i.e. on the basis of original minus clamp circuit 20b output waveform Vo (as shown in Figure 7).When Vi is in just
During half cycle, the first diode D conductings, the first electric capacity C charges up to reaching V values, as VC=-V, now Vo=-
V1.When Vi waveforms are in negative half period suddenly, the first diode D is not turned on, Vo=VC+Vi+V1=-2V-V1. finally via
Negative clamp circuit 20d outputs Vo waveform such as Figure 11.
Figure 12 show forward bias positive pressure clamp circuit 20e circuit diagram.Figure 13 is that reverse biased biases positive clamper
Circuit 20f circuit diagram.In positive clamp circuit 20, when the positive pole of the first reference voltage V1 is electrically connected with described the
During one diode D positive pole, the positive clamp circuit is the positive clamp circuit 20e of forward bias die mould.When first reference voltage
When V1 negative pole is electrically connected with the positive pole of the first diode D, the positive clamp circuit is the positive clamp circuit of reverse biased type
20f。
Figure 14 show the positive clamp circuit 20e output waveforms Vo of forward bias die mould oscillogram, and Figure 15 is shown reversely partially
The positive clamp circuit 20f of die mould output waveform Vo oscillogram.The output waveform of positive clamp circuit 20e forward bias die mould circuit
Vo deviates V1 on the basis of original minus clamp circuit 20a output waveform Vo (as shown in Figure 6) to positive direction of principal axis.When Vi is in
During negative half period, the first diode D is not turned on, and the first electric capacity C charges up to reaching V values, as VC=V, now Vo
=+V1.When Hall waveform Vi is in positive half cycle, the first diode D is not turned on, and Vo=VC+Vi+V1=2V+V1. is final
Via positive clamp circuit 20e output waveforms Vo such as Figure 14.The output waveform Vo of positive clamp circuit 20f reverse biased type circuit is
Deviate V1 to negative direction of principal axis on the basis of original minus clamp circuit 20a output waveform Vo (as shown in Figure 6).When Vi is in negative half
Zhou Shi, the first diode D conductings, the first electric capacity C charge up to reaching V values, as VC=V, now Vo=-V1.
When Hall waveform is in positive half cycle, the first diode D conductings, Vo=VC+Vi+V1=2V-V1. is finally via negative clamper
Circuit 20f output waveforms Vo such as Figure 15.
Figure 16 to Figure 18 is refer to, Figure 16 is the input waveform Vi of Hall waveform oscillogram, and Figure 17, which is shown, works as Hall
Waveform Vi inputs negative clamp circuit 20b output Vo oscillograms when being sine wave Vi.Figure 18 is shown when Hall waveform Vi inputs are
Positive clamp circuit 20a outputs Vo oscillograms during sine wave.Its basic clamping action principle is constant.
It refer to Fig. 2, in the better embodiment of the utility model Hall sensor circuit, clamp circuit 20 includes one the
Two electric capacity C5, a second resistance R4 and one second diode D3, the second electric capacity C5, second resistance R4 and the second diode D3
Form positive clamp circuit.
One end of the pull-up resistor R2 is electrically connected with a positive source VCC (power supply VCC is dc source), the pull-up
The resistance R2 other end is electrically connected with an output terminals A 0 of described filter capacitor C2 one end and Hall element 10, the filter capacitor
C2 other end electrical ground.The negative pole of the second electric capacity C5 is electrically connected with the output terminals A 0 of the Hall element 10, described
Second electric capacity C5 positive pole is electrically connected with the negative pole of the second diode D3, and the positive pole of the second diode D3 is electrically connected with
Ground.The second resistance R4 and the second diode D3 parallel connections and its one end being connected with the second diode D3 positive pole electricity
Property ground connection.The Hall element 10 has three pins, and described wherein one is power pins (not indicating) and is electrically connected with electricity
Source positive pole VCC, wherein another pin is grounding pin (not indicating) and electrical ground, last root pin is output end
A0.The negative pole of the second diode D3 is as output terminals A.The capacitance of the second electric capacity C5 and the resistance of the second resistance R4
The product of value is far longer than waveform frequency, so that alteration of form does not occur for waveform.Determine in the direction of the second diode D3
Determine clamp circuit 20 and still bear clamper for positive clamper.The utility model Hall sensor circuit is not when needing clamp circuit, institute
Circuit can not be welded into by stating second resistance R4 and the second diode D3, and the second electric capacity C5 be changed to place resistance be
10-100 Ω resistance.
Input voltage can be become peak value and clamp down on the output voltage on a certain predetermined level by the clamp circuit 20, and
Do not change signal.The level of input signal is moved up or moved down, and does not change the waveform of input signal.In the outer of Hall element
Increase clamp circuit 20 on circuit is enclosed, the waveform of Hall element can be made to move up the latter as required and moved down, and simply ensures RC
Constant is sufficiently large, i.e., will not change corresponding waveform shape.
Figure 19 is refer to, the utility model Hall sensor circuit also includes power circuit 40 to be provided for Hall element 10
Power supply.The power circuit 40 includes power supply chip 41, and the power supply chip 41 includes power supply output pin A1 and grounding pin
A2, the voltage of the power supply output pin A1 outputs+24V.The power supply output pin A1 is electrically connected with one the 3rd diode D1
Positive pole (the utility model uses IN4148), the negative pole of the 3rd diode D1 is as positive source VCC.Described 3rd 2
One the 3rd electric capacity C3 (the 3rd electric capacity C3 capacitances in the utility model are accessed between pole pipe D1 negative pole and the grounding pin A2
ROHS or thick film patch capacitor for 100nF), play a part of power filter, to remove some spikes, hair on power supply
Pierce signal.The 3rd diode D1 can prevent that the both positive and negative polarity of power line is reversed.
The utility model adds filter capacitor C2 and the 3rd electric capacity C3 in the peripheral processes circuit of Hall element 10, can be right
Input voltage and Hall input waveform play filter action.Pull-up resistor R2 is set together to influence Hall ripple with filter capacitor C2
The time of rising edge in shape.Clamp circuit 20 is added, according to environmental demand Hall waveform can be made to produce potential shift.
Claims (10)
1. a kind of Hall sensor circuit, it has the rotor of rotating speed to measure its rotating speed to be installed on one, and the Hall passes
Sensor circuit includes a Hall element, and the Hall element includes the first pin of one power supply of connection, the second of an electrical ground
Pin and the 3rd pin as waveform output end, it is characterised in that：3rd pin is electrically connected with a clamp circuit, described
Clamp circuit include one first electric capacity, first diode connected with first electric capacity and with first diodes in parallel
First resistor, output of the one end as Hall sensor circuit being electrically connected with first electric capacity of the first resistor
End, the other end electrical ground of the first resistor.
2. Hall sensor circuit as claimed in claim 1, it is characterised in that：The negative pole access Hall member of first electric capacity
3rd pin of part, the positive pole of first electric capacity are electrically connected with one end of first diode.
3. Hall sensor circuit as claimed in claim 2, it is characterised in that：The positive pole of first electric capacity is electrically connected with institute
The negative pole of the first diode, the negative pole electrical ground of first diode are stated, the clamp circuit is positive clamp circuit.
4. Hall sensor circuit as claimed in claim 2, it is characterised in that：The positive pole of first electric capacity is electrically connected with institute
The positive pole of the first diode, the positive pole electrical ground of first diode are stated, the clamp circuit is negative clamp circuit.
5. the Hall sensor circuit as described in claim 3 or 4, it is characterised in that：The Hall sensor circuit also includes
One pull-up resistor, one end of the pull-up resistor are electrically connected with power supply, the other end of the pull-up resistor be electrically connected with described in suddenly
3rd pin of your element.
6. Hall sensor circuit as claimed in claim 5, it is characterised in that：The Hall sensor circuit also includes a filter
Ripple electric capacity, one end of the filter capacitor are electrically connected with the 3rd pin of the Hall element, the other end of the filter capacitor
Electrical ground.
7. the Hall sensor circuit as described in claim 3 or 4, it is characterised in that：The clamp circuit also includes a reference
Voltage, the reference voltage and first Diode series, first diode and the reference voltage and described first
Resistor coupled in parallel.
8. Hall sensor circuit as claimed in claim 7, it is characterised in that：The power supply includes power supply chip, the confession
Electrical chip includes an output pin and a grounding pin.
9. Hall sensor circuit as claimed in claim 8, it is characterised in that：The output pin of the power supply is electrically connected with one
The positive pole of 3rd diode, the output end of the negative pole of the 3rd diode as power supply.
10. Hall sensor circuit as claimed in claim 9, it is characterised in that：The negative pole of 3rd diode and described
One the 3rd electric capacity is accessed between grounding pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720664670.2U CN207181438U (en) | 2017-06-08 | 2017-06-08 | Hall sensor circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720664670.2U CN207181438U (en) | 2017-06-08 | 2017-06-08 | Hall sensor circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207181438U true CN207181438U (en) | 2018-04-03 |
Family
ID=61734665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720664670.2U Expired - Fee Related CN207181438U (en) | 2017-06-08 | 2017-06-08 | Hall sensor circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207181438U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975590A (en) * | 2019-05-13 | 2019-07-05 | 江苏原容新能源科技有限公司 | Current measurement circuit based on Hall chip and shunt resistance |
-
2017
- 2017-06-08 CN CN201720664670.2U patent/CN207181438U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975590A (en) * | 2019-05-13 | 2019-07-05 | 江苏原容新能源科技有限公司 | Current measurement circuit based on Hall chip and shunt resistance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20180403 |