CN118209138B - Hall sensor module and element - Google Patents
Hall sensor module and element Download PDFInfo
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- CN118209138B CN118209138B CN202410628961.0A CN202410628961A CN118209138B CN 118209138 B CN118209138 B CN 118209138B CN 202410628961 A CN202410628961 A CN 202410628961A CN 118209138 B CN118209138 B CN 118209138B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
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Abstract
The invention relates to the technical field of electronic measurement, in particular to a Hall sensor module and an element, wherein the Hall sensor module comprises: the Hall sensor and the working module are electrically connected with each other; the working/logic module is electrically connected with the Hall sensor and used for determining the running state of the working module; wherein, the work/logic module is electrically connected with the VDD power input port and the transistor Q1; the transistor Q1 is connected in parallel with the transistor Q2, and the transistor Q1 and the transistor Q2 are both electrically connected to the OUT output port. Compared with the traditional Hall sensor module, the invention has the advantages that the measurement precision, the temperature stability and the anti-interference capability are effectively improved, the application range is widened, and the requirement of long-term stable work in a complex environment is especially met.
Description
Technical Field
The invention relates to the technical field of electronic measurement, in particular to a Hall sensor module and a component.
Background
Hall effect integrated circuits (hall ICs for short) are an important branch of magneto-dependent sensors, which are widely used in various fields such as current monitoring, position sensing and motion control. The conventional hall IC generally includes a hall element and a signal processing circuit, and integrates the two on the same chip, and simultaneously indirectly measures physical quantities such as current or displacement by detecting the magnetic field strength.
However, in practical applications, conventional hall ICs have some inherent problems. Such as:
1) The output characteristics of the device drift seriously due to the influence of temperature variation;
2) The response speed is easy to be limited under high frequency, so that the application effect is greatly limited under the environments of precise measurement and high-speed dynamic;
3) There is an increasing demand in the market for improving the integration level to reduce the system size and simplify the circuit design, and there is still room for improvement in this respect for the existing hall ICs.
In view of this, a new design scheme of hall IC is needed so that it can ensure measurement accuracy and stability, and at the same time, also improve its overall performance, and can adapt to more severe application environments.
Disclosure of Invention
The present invention is directed to a hall sensor module and a hall sensor element, so as to solve the problems set forth in the background art.
The technical scheme of the invention is as follows: a hall sensor module comprising:
the Hall sensor and the working module are electrically connected with each other;
the working/logic module is electrically connected with the Hall sensor and used for determining the running state of the working module; wherein, the work/logic module is electrically connected with the VDD power input port and the transistor Q1; the transistor Q1 is connected with the transistor Q2 in parallel, and the transistor Q1 and the transistor Q2 are electrically connected with an OUT output port;
the working module is as follows:
the chopper amplifier is electrically connected with the working/logic module and is used for reducing noise and improving signal to noise ratio by periodically switching the polarity of an input signal;
the hysteresis comparator is electrically connected with the working/logic module and is used for increasing the input variation required by the change of the output state;
the hysteresis comparator is electrically connected with the Hall sensor through the chopper amplifier so as to acquire the change voltage generated by the Hall sensor.
As a further improvement of the above hall sensor module: the hysteresis comparator comprises:
The threshold control unit is electrically connected with the Hall sensor; the threshold control unit is provided with a controller integrating a temperature sensor and is used for monitoring the temperature of the environment;
the noise suppression unit is electrically connected with the threshold control unit; the noise suppression unit adopts a differential amplification method and a filtering method.
As a further improvement of the above hall sensor module: the chopper amplifier comprises:
and the high-impedance buffer is electrically connected with the Hall sensor and is used for enhancing the fidelity of the input variable voltage signal.
As a further improvement of the above hall sensor module: the chopper amplifier further comprises:
the low-pass filter is electrically connected with the Hall sensor; the low-pass filter adopts a notch structure;
The self-calibration unit is electrically connected with the Hall sensor; wherein, the self-calibration unit adopts digital control logic;
the high-impedance buffer, the low-pass filter and the self-calibration unit are electrically connected with each other.
As a further improvement of the above hall sensor module: the chopper amplifier further comprises:
And the power management unit is connected with the high-impedance buffer, the low-pass filter and the self-calibration unit in parallel and is used for automatically adjusting the working states of the high-impedance buffer, the low-pass filter and the self-calibration unit.
As a further improvement of the above hall sensor module: when the Hall sensor operates, the self-calibration unit is used for calibrating and compensating temperature, and the programming interface is used for configuring working modes and parameters.
A hall integrated element comprising:
an internal circuit board in which a work/logic module, a hall sensor and a work module are arranged; wherein, the outer surface of the internal circuit board is sprayed with epoxy resin;
A package for internally packaging the internal circuit board; wherein the inner wall of the tube shell is attached to the epoxy resin;
Pins connected with the internal circuit board through wires; wherein, the pin is electrically connected with an external circuit.
As a further improvement of the hall integrated element described above: the method also comprises the following steps:
A capacitor C1 electrically connected with a VCC power port of the Hall sensor; a capacitor C2 electrically connected with an output OUT port of the Hall sensor; wherein, the capacitor C1 and the capacitor C2 are grounded;
The resistor R1 is electrically connected with the OUT output port of the Hall sensor and is used for limiting current;
A diode D1 electrically connected with a VCC power port of the Hall sensor; a diode D2 electrically connected with an OUT output port of the Hall sensor; wherein, the diode D1 and the diode D1 are grounded.
As a further improvement of the hall integrated element described above: the pins are provided with a plurality of pins which are respectively and electrically connected with different ports;
The Hall sensor is connected with the input port and is used for receiving three paths of differential input signals transmitted by the Hall sensor;
The Hall sensor is connected with the output port and is used for outputting a magnetic field intensity signal detected by the Hall sensor; wherein the magnetic field strength signal is an analog signal;
The power supply is connected with an external power supply and used for providing a working power supply required by operation;
is connected with the ground wire and is used for connecting the ground wire of the circuit.
As a further improvement of the hall integrated element described above: the method also comprises the following steps:
The reluctance motor is electrically connected with the VCC power port of the Hall sensor and is used for transmitting energy generated by magnetic field change to the Hall sensor;
And the DC-DC converter is electrically connected with the reluctance motor and is used for adapting the Hall sensor and the reluctance motor.
The invention provides a Hall sensor module and a component through improvement, and compared with the prior art, the Hall sensor module has the following improvements and advantages:
the method comprises the following steps: according to the invention, the polarity of an input signal is periodically switched through the chopper amplifier, so that the noise influence is effectively reduced, the signal-to-noise ratio of an output signal of the Hall sensor is improved, the temperature sensor integrated by the threshold control unit can monitor the ambient temperature in real time and perform temperature compensation on the output of the Hall sensor, the performance of the Hall sensor can still be kept stable under different temperature environments, and the noise suppression unit adopting the differential amplification and filtering technology is adopted, so that the noise suppression capability of the system is enhanced, the output is more accurate, and therefore, compared with the traditional Hall sensor module, the measurement precision, the temperature stability and the anti-interference capability of the Hall sensor module are effectively improved, the application range of the Hall sensor module is widened, and the requirement of long-term stable operation in a complex environment is especially met;
and two,: according to the invention, the self-calibration unit for calibrating the digital control logic of the Hall sensor is realized through the high-impedance buffer capable of maintaining the high fidelity of the input signal, so that the overall measurement precision can be improved;
And thirdly,: the power management unit capable of automatically adjusting the working states of all the partial circuits is beneficial to saving energy and prolonging the service life of devices, and meanwhile, due to the design of the reluctance motor and the DC-DC converter, the energy of magnetic field change can be converted into electric energy for the Hall sensor, so that the power management unit accords with the ideas of environmental protection and energy efficient utilization.
Drawings
The invention is further explained below with reference to the drawings and examples:
FIG. 1 is a schematic diagram of a frame of a Hall sensor module of the present invention;
FIG. 2 is a schematic diagram of the structure of a Hall integrated element of the present invention;
FIG. 3 is a schematic diagram of a frame of a Hall integrated component of the present invention;
FIG. 4 is a schematic diagram of the composition of a chopper amplifier of the present invention;
FIG. 5 is a schematic diagram of the composition of the hysteresis comparator of the present invention;
FIG. 6 is a graph of magnetic induction versus output voltage for the present invention;
FIG. 7 is a graph of test results of a Hall integrated device of the present invention at high temperature;
Reference numerals illustrate:
1. A work/logic module; 2. a hall sensor; 3. a hysteresis comparator; 301. a threshold control unit; 302. a noise suppressing unit; 4. a chopper amplifier; 401. a high impedance buffer; 402. a power management module; 403. a low pass filter; 404. a self-calibration unit; 5. an electric wire; 6. an internal circuit board; 7. a tube shell; 8. pins; 9. a transistor Q1; 10. transistor Q2.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be understood that the dimensions of the various elements shown in the figures are not drawn to actual scale, e.g., the thickness or width of some layers may be exaggerated relative to other layers for ease of description.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined or illustrated in one figure, no further detailed discussion or description thereof will be necessary in the following description of the figures.
Example 1
Referring to fig. 1, a hall sensor module is used to measure the magnetic field strength and convert this information into an electrical bit signal for output. The Hall sensor module comprises a working/logic module 1, a Hall sensor 2 and a working module. The Hall sensor 2 is electrically connected with the working/logic module 1 and the working module, and the working/logic module 1 and the working module are electrically connected.
The work/logic block 1 is electrically connected to the VDD power input port and the transistor Q19, while the transistor Q19 is connected in parallel with the transistor Q210, and the transistor Q19 and the transistor Q210 are both electrically connected to the OUT output port. Wherein the VDD power input port is used to provide an operating voltage to the overall circuit so that the operating/logic module 1 can determine the operating state of the operating module based on the detected magnetic field strength.
The working module comprises a hysteresis comparator 3 and a chopper amplifier 4 which are electrically connected with the working/logic module 1. The hysteresis comparator 3 is electrically connected with the hall sensor 2 through the chopper amplifier 4 so as to obtain the change voltage generated by the hall sensor 2. In this embodiment, the hysteresis comparator 3 is an analog circuit with a positive feedback mechanism, so as to increase the amount of input variation required when the output state changes, so as to avoid false triggering due to interference or drift. Chopper amplifier 4 is a special amplifier that reduces noise and improves signal-to-noise ratio, and the polarity of the input signal can be periodically switched by chopper amplifier 4 to perform its function.
When an external magnetic field acts on the Hall sensor 2, the output voltage of the Hall sensor 2 changes correspondingly, namely, corresponding voltage changes are generated according to the action of the external magnetic field. At the same time, the changed voltage is firstly processed by the chopper amplifier 4 and then is sent to the hysteresis comparator 3 for comparison, and the working state is determined according to the comparison result. That is, when the comparison result shows that the preset threshold is reached, the OUT output port will give a corresponding signal to indicate that the magnetic field strength has exceeded the set range. And when the comparison result shows that the preset threshold value is not reached, the external magnetic field is continuously monitored while the original state is continuously kept unchanged.
Example 2
Referring to fig. 4 and 5, the present embodiment is specifically described with respect to the structures of the hysteresis comparator 3 and the chopper amplifier 4, and the operation principle thereof is different from the above-described principle in that: the hysteresis comparator 3 includes a threshold control unit 301 and a noise suppression unit 302, and the chopper amplifier 4 includes a high-impedance buffer 401, a power management unit 402, a low-pass filter 403, and a self-calibration unit 404. The method comprises the following steps:
The hall sensor 2 is electrically connected with a threshold control unit 301, a high-impedance buffer 401, a low-pass filter 403 and a self-calibration unit 404. The noise suppression unit 302, the high-impedance buffer 401, the low-pass filter 403 and the self-calibration unit 404 are electrically connected to each other, and are also electrically connected to the power management unit 402.
In this embodiment, the hysteresis comparator 3 includes:
And the input port is used for receiving an input signal provided by an external signal source. Meanwhile, after the input signal is processed by filtering, amplifying and the like, unnecessary noise components can be eliminated, so that the signal received in the subsequent comparator can be ensured to be more complete.
The comparator comprises at least one comparison unit with hysteresis characteristics, wherein the hysteresis characteristics are formed by a positive feedback mechanism which is dynamically regulated, that is, when an input signal changes, the comparator generates two different threshold voltages and forms a preset hysteresis window, so that the output oscillation caused by noise is avoided when the threshold voltage is near.
The threshold control unit 301 is configured to dynamically adjust the size of the hysteresis window according to an external condition, and adjust the hysteresis window based on a temperature compensation algorithm or a user input signal. Meanwhile, the threshold control unit 301 is provided with a controller integrated with a temperature sensor, and is used for monitoring the temperature of the environment, and the hysteresis window can be dynamically adjusted according to the temperature, so that the temperature stability of the comparator is ensured.
The output port comprises an output protection self-locking function, can immediately trigger protection action when detecting that an input signal exceeds a set range, and keeps a locking state until normal input is restored. The output protection self-locking circuit adopts a semiconductor switching device, can rapidly cut off output under overload condition, and automatically resets after overload is relieved. Further, when the input signal exceeds a preset threshold, an output protection self-locking function in the output port is activated, so that the output is rapidly disconnected, and the circuit is prevented from being damaged.
The noise suppression unit 302 can effectively reduce the sensitivity of the comparator to noise by using a differential amplification technology and a filtering technology, and improve the stability and reliability of signals.
Further, when the hysteresis comparator 3 operates, it obtains an input signal from the outside and dynamically adjusts the size of the hysteresis window according to a specific value of the input signal. The comparator executes comparison operation, compares the input signal with a preset threshold value, and outputs a corresponding result according to the comparison result. And when the abnormality of the input signal is detected, the output protection self-locking mechanism is started immediately to lock the output state, and after the input signal is recovered to be normal, the locking is automatically released to recover the normal transmission of the signal.
In this embodiment, the chopper amplifier 4 includes:
The high-impedance buffer 401 is disposed in the input port and is used for receiving the analog signal, so that the integrity of the original analog signal can be effectively maintained, the fidelity of the input variable voltage signal is enhanced, and the influence of the input bias current is reduced.
A chopping unit including at least one chopping switch therein and configured to chop an input signal acquired by the high impedance buffer 401 at a set frequency.
And the phase comparator is used for comparing the phase of the chopped signals so as to reduce the occurrence of offset voltage.
The low-pass filter 403 adopts a notch structure, which is used for efficiently suppressing the chopping ripple noise under a specific frequency, and the notch frequency can adapt to different working environments after being optimized.
The self-calibration unit 404 can dynamically adjust the chopping frequency and gain parameters according to real-time temperature data by using digital control logic, and can improve the stability and accuracy of the amplifier in the whole temperature range. Where it can configure the operating mode and parameters through the programming interface.
Example 3
Referring to fig. 2 and 3, the hall integrated element in the present embodiment operates with the hall sensor module in the above embodiment as a built-in chip. The Hall integrated element comprises:
the working/logic module 1, the Hall sensor 2 and the internal circuit board 6 of the working module are arranged inside, and meanwhile, the outer surface of the internal circuit board 6 is sprayed with epoxy resin to enhance the protection performance and stability of the internal circuit board.
The inner wall of the tube shell 7 of the inner packaging inner circuit board 6 is attached to the epoxy resin, so that the safety and durability of the inner circuit are ensured.
The pin 8 is electrically connected with an external circuit through the pin 8 connected with the internal circuit board 6 through the wire 5. In this embodiment, a plurality of pins 8 are provided and are electrically connected to different ports respectively. Further, the method comprises the following steps: is connected with the input port and is used for receiving three paths of differential input signals transmitted by the Hall sensor 2. The magnetic field intensity signal detection device is connected with the output port and is used for outputting a magnetic field intensity signal detected by the Hall sensor 2; wherein the magnetic field strength signal is an analog signal. Is connected with an external power supply and is used for providing working power supply required by operation. Is connected with the ground wire and is used for connecting the ground wire of the circuit.
And the capacitor C1 is electrically connected with the VCC power port of the Hall sensor 2, the capacitor C2 is electrically connected with the output OUT port of the Hall sensor 2, and meanwhile, the capacitor C1 and the capacitor C2 are grounded. Which serves to stabilize the supply voltage and filter the output signal.
And a resistor R1 electrically connected with the OUT output port of the Hall sensor 2, wherein the resistor R1 is used for limiting current.
Diode D1 electrically connected to VCC power port of hall sensor 2, diode D2 electrically connected to OUT output port of hall sensor 2, and both diode D1 and diode D1 are grounded. Which is used to prevent reverse voltage and transient overvoltage from damaging the sensor.
And the reluctance motor is electrically connected with the VCC power port of the Hall sensor 2 and is used for transmitting energy generated by magnetic field change to the Hall sensor 2. Further, when the hall sensor 2 has no power management portion, a DC-DC converter electrically connected to the reluctance motor needs to be provided for adapting the hall sensor 2 and the reluctance motor to ensure effective operation of the entire element.
In this embodiment, after 5 cycles of the hall integrated device during the thermal shock process, the package case 7 and the epoxy resin still remain in a bonded state. One cycle is to hold at-20.+ -. 2 ℃ for one hour and then at 60.+ -. 2 ℃ for one hour. The process of which can be seen in fig. 7. That is, the hall element in this embodiment is heated to 80 ℃ and maintained for 10 minutes, then rapidly cooled to 0 ℃ and maintained again for 10 minutes, and further cooled to-20 ℃ and maintained for 10 minutes. So that the hall integrated element in the present embodiment can be embodied. Referring also to fig. 6, the output switching characteristics of the hall element include an on threshold BOPN, a forward saturation point BRPS, an off threshold BRPS, and a reverse saturation point BRPN. That is, the hall integrated element can be used as a magnetic switch, and the on and off of the circuit is controlled by detecting a change in an external magnetic field. When the magnetic induction intensity exceeds a preset starting threshold value, the switch is switched to a high level state, which is equivalent to the circuit opening. When the magnetic induction intensity is lower than a preset turn-off threshold value, the circuit is restored to a low level state, which is equivalent to turning off the circuit.
Wherein on threshold BOPN indicates that the output voltage of the element is at a low level, indicating that the element is not activated or off. The forward saturation point BRPS indicates that when the magnetic induction exceeds this set value, the output voltage of the element reaches a maximum value, and the element is in a conducting state. The off threshold BRPS indicates that when the magnetic induction is below this set value, the output voltage of the element will again become minimal, and the element will then re-enter the off state. The reverse saturation point BRPN indicates that at this magnetic induction, the output voltage of the element is at a minimum level.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A kind of Hall sensor module, the method is characterized by comprising the following steps:
the Hall sensor (2) and the working module are electrically connected with each other;
The working/logic module (1) is electrically connected with the Hall sensor (2) and used for determining the running state of the working module; wherein, the work/logic module (1) is electrically connected with the VDD power supply input port and the transistor Q1 (9); the transistor Q1 (9) is connected with the transistor Q2 (10) in parallel, and the transistor Q1 (9) and the transistor Q2 (10) are electrically connected with an OUT output port;
the working module is as follows:
The chopper amplifier (4) is electrically connected with the working/logic module (1) and is used for reducing noise and improving signal to noise ratio by periodically switching the polarity of an input signal;
the hysteresis comparator (3) is electrically connected with the working/logic module (1) and is used for increasing the input variation required by the change of the output state;
The hysteresis comparator (3) is electrically connected with the Hall sensor (2) through the chopper amplifier (4) so as to obtain the change voltage generated by the Hall sensor (2);
Wherein:
The chopper amplifier (4) comprises: the self-calibration device comprises a high-impedance buffer (401) electrically connected with the Hall sensor (2), a low-pass filter (403) electrically connected with the Hall sensor (2) and a self-calibration unit (404) electrically connected with the Hall sensor (2); the high-impedance buffer (401), the low-pass filter (403) and the self-calibration unit (404) are electrically connected with each other;
the chopper amplifier (4) further comprises:
A power management unit (402) connected in parallel with the high-impedance buffer (401), the low-pass filter (403) and the self-calibration unit (404), and configured to automatically adjust the operating states of the high-impedance buffer (401), the low-pass filter (403) and the self-calibration unit (404);
when the Hall sensor (2) operates, the self-calibration unit (404) is used for calibrating the compensation temperature, and the programming interface is used for configuring the working mode and parameters.
2. A hall sensor module according to claim 1, characterized in that the hysteresis comparator (3) comprises:
A threshold control unit (301) electrically connected with the hall sensor (2); wherein the threshold control unit (301) is provided with a controller integrating a temperature sensor and is used for monitoring the environmental temperature;
A noise suppression unit (302) electrically connected to the threshold control unit (301); wherein the noise suppression unit (302) adopts a differential amplification method and a filtering method.
3. A hall sensor module according to claim 1, characterized in that the high impedance buffer (401) electrically connected to the hall sensor (2) is used to enhance the fidelity of the input varying voltage signal.
4. A hall sensor module according to claim 3, characterized in that the low-pass filter (403) adopts a notch structure; the self-calibration unit (404) employs digital control logic.
5. A hall integrated element, comprising:
An operation/logic module (1), a Hall sensor (2) and an internal circuit board (6) of the operation module are arranged in the operation/logic module; wherein the outer surface of the inner circuit board (6) is sprayed with epoxy resin;
a package (7) internally encapsulating the internal circuit board (6); wherein the inner wall of the tube shell (7) is attached with epoxy resin;
Pins (8) connected with the internal circuit board (6) through wires (5); wherein the pin (8) is electrically connected with an external circuit;
A chopper amplifier (4) electrically connected to the operation/logic module (1) for periodically switching the polarity of the input signal; the chopper amplifier (4) comprises a high-impedance buffer (401) electrically connected with the Hall sensor (2); the chopper amplifier (4) further comprises a low-pass filter (403) electrically connected with the Hall sensor (2), and a self-calibration unit (404) electrically connected with the Hall sensor (2); the high-impedance buffer (401), the low-pass filter (403) and the self-calibration unit (404) are electrically connected with each other; the chopper amplifier (4) further comprises: a power management unit (402) connected in parallel with the high-impedance buffer (401), the low-pass filter (403) and the self-calibration unit (404), and configured to automatically adjust the operating states of the high-impedance buffer (401), the low-pass filter (403) and the self-calibration unit (404);
when the Hall sensor (2) operates, the self-calibration unit (404) is used for calibrating the compensation temperature, and the programming interface is used for configuring the working mode and parameters.
6. The hall element according to claim 5, further comprising:
a capacitor C1 electrically connected with a VCC power supply port of the Hall sensor (2); a capacitor C2 electrically connected with an output OUT port of the Hall sensor (2); wherein, the capacitor C1 and the capacitor C2 are grounded;
The resistor R1 is electrically connected with the OUT output port of the Hall sensor (2) and is used for limiting current;
A diode D1 electrically connected with a VCC power supply port of the Hall sensor (2); a diode D2 electrically connected with an OUT output port of the Hall sensor (2); wherein, the diode D1 and the diode D1 are grounded.
7. The hall ic according to claim 5, wherein a plurality of pins (8) are provided, each of which is electrically connected to a different port;
The Hall sensor is connected with an input port and is used for receiving three differential input signals transmitted by the Hall sensor (2);
The Hall sensor is connected with an output port and is used for outputting a magnetic field intensity signal detected by the Hall sensor (2); wherein the magnetic field strength signal is an analog signal;
The power supply is connected with an external power supply and used for providing a working power supply required by operation;
is connected with the ground wire and is used for connecting the ground wire of the circuit.
8. The hall element according to claim 5, 6 or 7, further comprising:
The reluctance motor is electrically connected with the VCC power port of the Hall sensor (2) and is used for transmitting energy generated by magnetic field change to the Hall sensor (2);
And the DC-DC converter is electrically connected with the reluctance motor and is used for adapting the Hall sensor (2) and the reluctance motor.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103733082A (en) * | 2012-05-11 | 2014-04-16 | 旭化成微电子株式会社 | Magnetic detection device and magnetic detection method |
| CN116973816A (en) * | 2023-09-21 | 2023-10-31 | 昂赛微电子（上海）有限公司 | Magnetic field zero-crossing detection control circuit and method and Hall magneto-dependent trigger chip |
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| US6747425B2 (en) * | 2002-01-24 | 2004-06-08 | Asahi Kasei Microsystems Co. Ltd | System for sharing power and signal pins on a motor controller |
| JP4313729B2 (en) * | 2004-06-18 | 2009-08-12 | 東光株式会社 | Magnetic sensor circuit |
| CN209673833U (en) * | 2019-05-17 | 2019-11-22 | 苏州霍姆特传感技术有限公司 | A sensor for measuring speed and steering |
| CN113703512B (en) * | 2021-11-01 | 2022-03-08 | 宁波中车时代传感技术有限公司 | Hall sensor temperature compensation circuit and compensation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103733082A (en) * | 2012-05-11 | 2014-04-16 | 旭化成微电子株式会社 | Magnetic detection device and magnetic detection method |
| CN116973816A (en) * | 2023-09-21 | 2023-10-31 | 昂赛微电子（上海）有限公司 | Magnetic field zero-crossing detection control circuit and method and Hall magneto-dependent trigger chip |
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