CN209488447U - A kind of filter circuit and sensor - Google Patents
A kind of filter circuit and sensor Download PDFInfo
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- CN209488447U CN209488447U CN201920544570.5U CN201920544570U CN209488447U CN 209488447 U CN209488447 U CN 209488447U CN 201920544570 U CN201920544570 U CN 201920544570U CN 209488447 U CN209488447 U CN 209488447U
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Abstract
The utility model discloses a kind of filter circuit and sensors.Filter circuit includes first order common mode filtering circuit, differential mode protection circuit, second level common mode filtering circuit and differential mode filter circuit.First output end of first order common mode filtering circuit is electrically connected with the first input end of differential mode protection circuit, and the second output terminal of first order common mode filtering circuit is electrically connected with the second input terminal of differential mode protection circuit.First output end of differential mode protection circuit is electrically connected with the first input end of second level common mode filtering circuit, and the second output terminal of differential mode protection circuit is electrically connected with the second input terminal of second level common mode filtering circuit.First output end of second level common mode filtering circuit is electrically connected with the first input end of differential mode filter circuit, and the second output terminal of second level common mode filtering circuit is electrically connected with the second input terminal of differential mode filter circuit.It is filtered by power supply signal of the filter circuit to power interface, improves the Electro Magnetic Compatibility of power interface.
Description
Technical field
The utility model embodiment is related to technical field of electromagnetic compatibility more particularly to a kind of filter circuit and sensor.
Background technique
Sensor often applies in the flight equipments such as aircraft, guided missile.Start for example, baroceptor may be mounted at jet
The tail position of machine, for detecting and feeding back the operating parameter of jet engine.In such usage scenario, to product sensor
The volumetric spaces of internal circuit, electromagnetism anti-interference ability have very high requirement.In addition, the new standard due to national military standard proposes
The design of unmasked line, therefore the filtering protection of shielded pair signal is reduced, cause the filtering to sensor itself to protect function
The requirement of energy improves, and further increases the contradiction between electromagnetic compatibility reliability and filtering protection occupied space.
Utility model content
The utility model provides a kind of filter circuit and sensor, to improve the filtering safeguard function of filter circuit, reduces
Contradiction between electromagnetic compatibility reliability and filtering protection occupied space.
In a first aspect, the utility model embodiment provides a kind of filter circuit, including first order common mode filtering circuit, difference
Mould protection circuit, second level common mode filtering circuit and differential mode filter circuit；
First output end of the first order common mode filtering circuit and the first input end of the differential mode protection circuit are electrically connected
It connects, the second output terminal of the first order common mode filtering circuit is electrically connected with the second input terminal of the differential mode protection circuit；Institute
The first output end for stating differential mode protection circuit is electrically connected with the first input end of the second level common mode filtering circuit, the differential mode
The second output terminal of protection circuit is electrically connected with the second input terminal of the second level common mode filtering circuit；The second level common mode
First output end of filter circuit is electrically connected with the first input end of the differential mode filter circuit, the second level common mode filtering electricity
The second output terminal on road is electrically connected with the second input terminal of the differential mode filter circuit.
Optionally, the first order common mode filtering circuit is common mode capacitance filter circuit；The common mode capacitance filter circuit
Including first capacitor and the second capacitor, the first end of the first capacitor is electrically connected with the first input end of the filter circuit,
The second end of the first capacitor is electrically connected with the first end of second capacitor, the second end and the filter of second capacitor
Second input terminal of wave circuit is electrically connected；The first end of the first capacitor is the first defeated of the first order common mode filtering circuit
Outlet, the second end of second capacitor are the second output terminal of the first order common mode filtering circuit.
Optionally, the common mode capacitance filter circuit further includes casing；The casing with the first capacitor
The electrical connection of the first end of two ends and second capacitor.
Optionally, filter circuit further includes transient diode；The first end of the transient diode and the first capacitor
First end electrical connection, the second end of the transient diode is electrically connected with the second end of second capacitor.
Optionally, the differential mode protection circuit includes third capacitor and the 4th capacitor；The first end of the third capacitor is
The first input end of the differential mode protection circuit, the second end of the third capacitor are the second input of the differential mode protection circuit
End；The first end of 4th capacitor is the first output end of the differential mode protection circuit, and the second end of the 4th capacitor is
The second output terminal of the differential mode protection circuit.
Optionally, the second level common mode filtering circuit includes common mode filtering inductance；The first of the common mode filtering inductance
Input terminal is the first input end of the second level common mode filtering circuit, and the second input terminal of the common mode filtering inductance is described
Second input terminal of second level common mode filtering circuit, the first output end of the common mode filtering inductance are second level common mode filter
First output end of wave circuit, the second output terminal of the common mode filtering inductance are the second of the second level common mode filtering circuit
Output end.
Optionally, the differential mode filter circuit is II type filter circuit；The II type filter circuit includes the 5th capacitor, the
Six capacitors and first resistor；The first end of 5th capacitor is electrically connected with the first end of the first resistor, first electricity
The second end of resistance is electrically connected with the first end of the 6th capacitor, and the of the second end of the 6th capacitor and the 5th capacitor
The electrical connection of two ends；
The first end of 5th capacitor be the differential mode filter circuit first input end, the second of the 5th capacitor
End is the second input terminal of the differential mode filter circuit；The first end of 6th capacitor is the first of the differential mode filter circuit
Output end, the second end of the 6th capacitor are the second output terminal of the differential mode filter circuit.
Optionally, filter circuit further includes the 7th capacitor；The of the first end of 7th capacitor and the 6th capacitor
One end electrical connection, the second end of the 7th capacitor are electrically connected with the second end of the 6th capacitor.
Optionally, the 7th capacitor is differential mode capacitor, and capacitance is greater than or equal to 10uF.
Second aspect, it includes power input port, internal circuit that the utility model embodiment, which additionally provides a kind of sensor,
The filter circuit provided with the utility model any embodiment；
The power input port is electrically connected with the filter circuit, and the filter circuit is electrically connected with the internal circuit
It connects.
The technical solution of the utility model embodiment, by the way that filter circuit is arranged at power interface, filter circuit includes
First order common mode filtering circuit, differential mode protection circuit, second level common mode filtering circuit and differential mode filter circuit, make filter circuit not
Only there is filtering safeguard function well, and area occupied is small.When the power supply signal that filter circuit provides power interface into
When row filtering, it not will increase the area that too many filter circuit occupies while improving the signal-to-noise ratio of power supply signal, improve electricity
The electromagnetic compatibility reliability of source interface, makes power interface meet the test requests such as the Electro Magnetic Compatibility of national military standard.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of filter circuit provided by the embodiment of the utility model；
Fig. 2 is the structural schematic diagram of another filter circuit provided by the embodiment of the utility model；
Fig. 3 is a kind of structural schematic diagram of sensor provided by the embodiment of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
The utility model embodiment provides a kind of filter circuit.Power supply line use is proposed in the new standard of national military standard
When unmasked line designs, the power interface in equipment is can be set in filter circuit.When power supply line provides power supply for equipment, filtering
Circuit is first filtered the power supply signal of power interface, and filter circuit not only has filtering safeguard function well, Er Qiezhan
It is small with area.Therefore the occupancy face of too many filter circuit in a device is not will increase while improving the signal-to-noise ratio of power supply signal
Product, improves the electromagnetic compatibility reliability of the power interface of equipment, the power interface of equipment is made to meet the electromagnetic compatibility of national military standard
The test requests such as property.
Fig. 1 is a kind of structural schematic diagram of filter circuit provided by the embodiment of the utility model.As shown in Figure 1, the filtering
Circuit includes first order common mode filtering circuit 110, differential mode protection circuit 120, second level common mode filtering circuit 130 and differential mode filtering
Circuit 140.First output end out1 of the first order common mode filtering circuit 110 and first input end in1 of differential mode protection circuit 120
Electrical connection, the second output terminal out2 of first order common mode filtering circuit 110 and the second input terminal in2 of differential mode protection circuit 120
Electrical connection.First output end out3 of the differential mode protection circuit 120 and first input end in3 of second level common mode filtering circuit 130
Electrical connection, the second output terminal out4 of differential mode protection circuit 120 and the second input terminal in4 of second level common mode filtering circuit 130
Electrical connection.First output end out5 of the second level common mode filtering circuit 130 and first input end in5 of differential mode filter circuit 140
Electrical connection, the second output terminal out6 of second level common mode filtering circuit 130 and the second input terminal in6 of differential mode filter circuit 140
Electrical connection.
Specifically, the first input end J1 of first order common mode filtering circuit 110 is electrically connected with the first power supply line V+, the first order
Second input terminal J2 of common mode filtering circuit 110 is electrically connected with second source line V-, for receiving the power supply letter of power supply line offer
Number.The input terminal of the first input end J1 of first order common mode filtering circuit 110 and the second input terminal J2 as filter circuit.First
Grade common mode filtering circuit 110 carries out common mode filtering to the power supply signal that power supply line provides, and filters the common mode interference in power supply signal
Signal.First order common mode filtering circuit 110 transmits power supply signal to differential mode protection circuit 120, and differential mode protection circuit 120 both can be with
The DM EMI signal of power supply signal is filtered, can also inhibit first order common mode filtering circuit 110 is uneven may shape
At DM EMI signal.Differential mode protection circuit 120 transmits power supply signal to second level common mode filtering circuit 130, and the second level is total
Mould filter circuit 130 has high frequency high-impedance behavior, can play good filter action to the common mode noise signal of low resistance source.
Second level common mode filtering circuit 130 transmits power supply signal to differential mode filter circuit 140, and differential mode filter circuit 140 can sufficiently press down
The interference signal that first order common mode filtering circuit 110 and second level common mode filtering circuit 130 processed are likely to form avoids power supply letter
Number shake, improve the stabilization of power supply signal.Filter circuit provided by the utility model has filtering safeguard function well,
And area occupied is small.After the power supply signal that power supply line provides is filtered by filter circuit, the noise of power supply signal can be improved
Than, while not will increase the area occupied of too many filter circuit in a device, improve the electricity for the equipment being electrically connected with power supply line
The electromagnetic compatibility reliability of source interface, makes the power interface of equipment meet the test requests such as the Electro Magnetic Compatibility of national military standard, thus
Reduce the contradiction between the electromagnetic compatibility reliability of equipment and filtering protection occupied space.
Illustratively, when power supply line provides power supply signal for sensor, the electricity in sensor is can be set in filter circuit
At source interface.Filter circuit has filtering safeguard function well, after filter circuit is filtered power supply signal, believes power supply
Number signal-to-noise ratio it is very high.It not will increase the area occupied of too many filter circuit in the sensor simultaneously, improve the electricity of sensor
The electromagnetic compatibility reliability of source interface, makes the power interface of sensor meet the test requests such as the Electro Magnetic Compatibility of national military standard, from
And reduce the contradiction between the electromagnetic compatibility reliability of sensor and filtering protection occupied space.
Based on the above technical solution, Fig. 2 is the knot of another filter circuit provided by the embodiment of the utility model
Structure schematic diagram.As shown in Fig. 2, first order common mode filtering circuit 110 is common mode capacitance filter circuit.Common mode capacitance filter circuit packet
First capacitor C1 and the second capacitor C2 are included, the first end of first capacitor C1 is electrically connected with the first input end J1 of filter circuit, the
The second end of one capacitor C1 is electrically connected with the first end of the second capacitor C2, and the second of the second end of the second capacitor C2 and filter circuit
Input terminal J2 electrical connection.The first end of first capacitor C1 is the first output end out1 of first order common mode filtering circuit 110, second
The second end of capacitor C2 is the second output terminal out2 of first order common mode filtering circuit 110.
Specifically, first capacitor C1 and the second capacitor C2 are composed in series first order common mode filtering circuit 110, first capacitor C1
Good filter action can be played to the common-mode noise in high resistant source with the second capacitor C2.
With continued reference to Fig. 2, common mode capacitance filter circuit 110 can also including casing PE.Casing ground PE and first capacitor
The second end of C1 and the electrical connection of the first end of the second capacitor C2.By being arranged in the point of intersection of first capacitor C1 and the second capacitor C2
Casing ground PE, PE releases a little as the filtering of first capacitor C1 and the second capacitor C2 with making casing, can make first capacitor C1 and
By casing PE discharges interference signal on second capacitor C2.
On the basis of above-mentioned each technical solution, with continued reference to Fig. 2, filter circuit further includes transient diode D1.Transient state
The first end of diode D1 is electrically connected with the first end of first capacitor C1, and the second end of transient diode D1 is with the second capacitor C2's
Second end electrical connection.
Specifically, transient diode D1 is the high-effect protection device of diode, when the two poles of the earth of transient diode D1
When by reversed transient state high energy impact events, transient diode D1 can be with the speed of 10 minus 12 power second-time, by its two interpolar
High impedance become Low ESR, absorb up to thousands of watts of surge power, make the voltage clamp of two interpolars in a predetermined value, have
Precision components in effect ground protection electronic circuit, from the damage of various surge pulses.Transient diode D1 and concatenated the
One capacitor C1 and the second capacitor C2 are in parallel, and the surge energy that power supply line transmitting coupling comes can be absorbed.
It should be noted that transient diode D1 is when on printed circuit board (Printed Circuit Board, PCB),
Upright projection of the transient diode D1 on PCB is not overlapped with other cablings, it is ensured that transient diode D1 and other cablings it
Between have the smallest lead-in inductance value.In addition, the PCB trace of transient diode D1 prime needs the line for guaranteeing to be not less than 10mil
Width, 1 ounce of copper are thick, it is ensured that the cabling through-current capability of surge pulse.
On the basis of above-mentioned each technical solution, with continued reference to Fig. 2, differential mode protection circuit 120 include third capacitor C3 and
4th capacitor C4.The first end of third capacitor C3 is the first input end in1 of differential mode protection circuit 120, the of third capacitor C3
Two ends are the second input terminal in2 of differential mode protection circuit 120.The first end of 4th capacitor C4 is the of differential mode protection circuit 120
The second end of one output end out3, the 4th capacitor C4 is the second output terminal out4 of differential mode protection circuit 120.
Specifically, the first end of the first end and first capacitor C1 of the first end of third capacitor C3 and the 4th capacitor C4 is electrically connected
It connects, the second end of third capacitor C3 and the second end of the 4th capacitor C4 are electrically connected with the second end of the second capacitor C2.Third capacitor
C3 and the 4th capacitor C4 composes in parallel differential mode capacitor filter circuit, and third capacitor C3 and the 4th capacitor C4 both can be to power supply signals
In existing interference be filtered, the differential mode that can also be generated to the filter circuit that first capacitor C1 and the second capacitor C2 is formed is dry
Signal is disturbed to be filtered.
In addition, filter circuit can design on PCB in the production process, therefore the ground of filter circuit can be to set floatingly
Meter, therefore the protection circuit in filter circuit can only consider differential mode protection.
It is it should be noted that the input terminal of the close filter circuit of filtering device and protective device as far as possible, i.e., close with filter
The power input port of wave circuit electrical connection, can reduce the inductance on the cabling between filtering device and power input port,
Avoid the inductive impact filter effect on cabling.The first input end J1 of filter circuit and the second input terminal J2 can be with difference shapes
Formula wiring, and the balanced, symmetrical as far as possible in wiring, to reduce the loop of DM EMI signal.In addition, first capacitor C1 and second
More via hole connections can be set in capacitor C2 or the width of cabling connected to it is bigger, can reduce distributed inductance.
On the basis of above-mentioned each technical solution, with continued reference to Fig. 2, second level common mode filtering circuit 130 is filtered including common mode
Wave inductance T1.The first input end of common mode filtering inductance T1 is the first input end in3 of second level common mode filtering circuit 130, altogether
The second input terminal of mould filter inductance T1 is the second input terminal in4, common mode filtering inductance T1 of second level common mode filtering circuit 130
The first output end be second level common mode filtering circuit 130 the first output end out5, common mode filtering inductance T1 second output
End is the second output terminal out6 of second level common mode filtering circuit 130.
Specifically, the first end and the 4th capacitor C4 of the first input end in3 of common mode filtering inductance T1 and third capacitor C3
First end electrical connection, the second end and the 4th capacitor C4 of the second input terminal in4 and third capacitor C3 of common mode filtering inductance T1
Second end electrical connection.Common mode filtering inductance T1 carries out common mode to the filtered power supply signal of third capacitor C3 and the 4th capacitor C4
Filtering, plays good filter action to common mode noise signal.Common mode filtering inductance T1 can be nickel core inductance, make common mode filtering
Inductance T1 can have better impedance operator in high band.
It should be noted that common mode filtering inductance T1 is when on PCB, upright projection of the common mode filtering inductance T1 on PCB
It is not overlapped with other cablings, and on PCB, guarantees that dividing strip is clear between common mode filtering inductance T1 and other cablings.One
As in the case of, spacing between common mode filtering inductance T1 and other cablings guarantees 150mil or more, it is ensured that common mode filtering inductance T1
Primary and secondary between other cablings couples minimum.
On the basis of above-mentioned each technical solution, with continued reference to Fig. 2, differential mode filter circuit is II type filter circuit.II type
Filter circuit includes the 5th capacitor C5, the 6th capacitor C6 and first resistor R1.The first end and first resistor R1 of 5th capacitor C5
First end electrical connection, the second end of first resistor R1 is electrically connected with the first end of the 6th capacitor C6, the second of the 6th capacitor C6
End is electrically connected with the second end of the 5th capacitor C5.The first end of 5th capacitor C5 is the first input end of differential mode filter circuit 140
The second end of in5, the 5th capacitor C5 are the second input terminal in6 of differential mode filter circuit 140.The first end of 6th capacitor C6 is poor
The second end of first output end J3, the 6th capacitor C6 of mould filter circuit 140 is the second output terminal of differential mode filter circuit 140
J4。
Specifically, the first output end J3 of differential mode filter circuit 140 is the first output end of filter circuit, differential mode filtered electrical
The second output terminal J4 on road 140 is the second output terminal of filter circuit.First resistor is provided in differential mode filter circuit 140
R1, first resistor R1 and the 5th capacitor C5 and the 6th capacitor C6 form II type filter circuit.First resistor R1 has than wider
It is applicable in frequency range, the II type filtered electrical formed relative to the devices such as magnetic bead or inductance and the 5th capacitor C5 and the 6th capacitor C6
II type filter circuit of road, first resistor R1 and the 5th capacitor C5 and the 6th capacitor C6 composition can be in broader frequency range
Obtain the better insertion loss value of consistency.In addition, the selection of first resistor R1 resistance value needs to fully consider that filter circuit exports
Power supply signal current value, to guarantee the current needs in late-class circuit.
On the basis of above-mentioned each technical solution, with continued reference to Fig. 2, filter circuit further includes the 7th capacitor C7.7th electricity
The first end for holding C7 is electrically connected with the first end of the 6th capacitor C6, the second end of the 7th capacitor C7 and the second end of the 6th capacitor C6
Electrical connection.
Specifically, the 7th capacitor C7 is differential mode capacitor, can paste ceramic disc capacitor for surface.Capacitance is greater than or equal to
10uF, energy storage are bigger.By the 7th capacitor C7 of parallel connection after the 6th capacitor C6, differential mode filter circuit 140 can be further smoothed
Surge pulse energy, reduce the requirement for the surge pulse ability to bear of circuit connecting with filter circuit output end.
The utility model embodiment also provides a kind of sensor, and Fig. 3 is a kind of sensing provided by the embodiment of the utility model
The structural schematic diagram of device.As shown in figure 3, sensor includes that power input port 10, internal circuit 20 and the utility model are any
The filter circuit 30 that embodiment provides.Power input port 10 is electrically connected with filter circuit 30, filter circuit 30 and internal circuit
20 electrical connections.
Specifically, power input port 10 is electrically connected with external power supply, and external power supply is sensor power supply.Work as external power supply
The power supply signal of offer is input to filter circuit 30 by power input port 10, and filter circuit 30 filters power supply signal
Wave, only power supply signal does not provide filtering safeguard function well, and area occupied is small in sensor.Therefore electricity is being improved
It not will increase the area occupied of too many filter circuit in the sensor while the signal-to-noise ratio of source signal, improve the electricity of sensor
The electromagnetic compatibility reliability of source input interface 10 makes the power input interface 10 of sensor meet the Electro Magnetic Compatibility etc. of national military standard
Test request.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright
Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments
The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from
It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Scope of the claims determine.
Claims (10)
1. a kind of filter circuit, which is characterized in that including first order common mode filtering circuit, differential mode protection circuit, second level common mode
Filter circuit and differential mode filter circuit；
First output end of the first order common mode filtering circuit is electrically connected with the first input end of the differential mode protection circuit, institute
The second output terminal for stating first order common mode filtering circuit is electrically connected with the second input terminal of the differential mode protection circuit；The differential mode
First output end of protection circuit is electrically connected with the first input end of the second level common mode filtering circuit, the differential mode protection electricity
The second output terminal on road is electrically connected with the second input terminal of the second level common mode filtering circuit；The second level common mode filtering electricity
First output end on road is electrically connected with the first input end of the differential mode filter circuit, and the of the second level common mode filtering circuit
Two output ends are electrically connected with the second input terminal of the differential mode filter circuit.
2. filter circuit according to claim 1, which is characterized in that the first order common mode filtering circuit is common mode capacitance
Filter circuit；The common mode capacitance filter circuit includes first capacitor and the second capacitor, the first end of the first capacitor and institute
The first input end electrical connection of filter circuit is stated, the second end of the first capacitor and the first end of second capacitor are electrically connected
It connects, the second end of second capacitor is electrically connected with the second input terminal of the filter circuit；The first end of the first capacitor
For the first output end of the first order common mode filtering circuit, the second end of second capacitor is the first order common mode filtering
The second output terminal of circuit.
3. filter circuit according to claim 2, which is characterized in that the common mode capacitance filter circuit further includes casing
Ground；It is electrically connected with the first end of the second end of the first capacitor and second capacitor to the casing.
4. filter circuit according to claim 2, which is characterized in that further include transient diode；The transient diode
First end be electrically connected with the first end of the first capacitor, the of the second end of the transient diode and second capacitor
The electrical connection of two ends.
5. filter circuit according to claim 2, which is characterized in that the differential mode protection circuit includes third capacitor and
Four capacitors；The first end of the third capacitor be the differential mode protection circuit first input end, the second of the third capacitor
End is the second input terminal of the differential mode protection circuit；The first end of 4th capacitor is the first of the differential mode protection circuit
Output end, the second end of the 4th capacitor are the second output terminal of the differential mode protection circuit.
6. filter circuit according to claim 5, which is characterized in that the second level common mode filtering circuit includes common mode filter
Wave inductance；The first input end of the common mode filtering inductance is the first input end of the second level common mode filtering circuit, described
Second input terminal of common mode filtering inductance is the second input terminal of the second level common mode filtering circuit, the common mode filtering inductance
The first output end be the second level common mode filtering circuit the first output end, the second output terminal of the common mode filtering inductance
For the second output terminal of the second level common mode filtering circuit.
7. filter circuit according to claim 6, which is characterized in that the differential mode filter circuit is II type filter circuit；
The II type filter circuit includes the 5th capacitor, the 6th capacitor and first resistor；The first end of 5th capacitor and described the
The first end of one resistance is electrically connected, and the second end of the first resistor is electrically connected with the first end of the 6th capacitor, and described the
The second end of six capacitors is electrically connected with the second end of the 5th capacitor；
The first end of 5th capacitor is the first input end of the differential mode filter circuit, and the second end of the 5th capacitor is
Second input terminal of the differential mode filter circuit；The first end of 6th capacitor is the first output of the differential mode filter circuit
End, the second end of the 6th capacitor are the second output terminal of the differential mode filter circuit.
8. filter circuit according to claim 7, which is characterized in that further include the 7th capacitor；The of 7th capacitor
One end is electrically connected with the first end of the 6th capacitor, the second end of the 7th capacitor and the second end electricity of the 6th capacitor
Connection.
9. filter circuit according to claim 8, which is characterized in that the 7th capacitor is differential mode capacitor, and capacitance is big
In or equal to 10uF.
10. a kind of sensor, which is characterized in that any described including power input port, internal circuit and claim 1-9
Filter circuit；
The power input port is electrically connected with the filter circuit, and the filter circuit is electrically connected with the internal circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920544570.5U CN209488447U (en) | 2019-04-19 | 2019-04-19 | A kind of filter circuit and sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920544570.5U CN209488447U (en) | 2019-04-19 | 2019-04-19 | A kind of filter circuit and sensor |
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| Publication Number | Publication Date |
|---|---|
| CN209488447U true CN209488447U (en) | 2019-10-11 |
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ID=68135519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920544570.5U Active CN209488447U (en) | 2019-04-19 | 2019-04-19 | A kind of filter circuit and sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117849439A (en) * | 2024-03-08 | 2024-04-09 | 成都新欣神风电子科技有限公司 | Magnetic balance type current sensor |
-
2019
- 2019-04-19 CN CN201920544570.5U patent/CN209488447U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117849439A (en) * | 2024-03-08 | 2024-04-09 | 成都新欣神风电子科技有限公司 | Magnetic balance type current sensor |
| CN117849439B (en) * | 2024-03-08 | 2024-06-07 | 成都新欣神风电子科技有限公司 | Magnetic balance type current sensor |
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