Magnetic sensor integrated circuit, motor assembly and application apparatus
First Claim
1. A magnetic sensor integrated circuit, comprising:
- a magnetic sensor receiving a constant current outputting a differential signal;
a signal processing unit converting the differential signal into a magnetic field detection signal; and
an output control circuit controlling, at least based on the magnetic field detection signal, the magnetic sensor integrated circuit to operate in at least one state of a first state in which a current flows from an output port of the magnetic sensor integrated circuit to an outside of the magnetic sensor integrated circuit and a second state in which a current flows from the outside into the output port; and
wherein the differential signal comprises a magnetic field signal and an offset signal, the signal processing unit comprises a first chopping switch to modulate the magnetic field signal and the offset signal to a high-frequency region and a baseband frequency respectively.
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Accused Products
Abstract
A magnetic sensor integrated circuit, a motor and an application apparatus. The magnetic sensor includes a magnetic sensor, a signal processing unit, an output control circuit and an output port. The magnetic sensor receives a constant current sense a magnetic polarity of an external magnetic field and output a differential signal. The signal processing unit amplifies the differential signal and eliminates an offset of the differential signal to obtain a magnetic field detection signal. The output control circuit control, at least based on the magnetic field detection signal, the magnetic sensor integrated circuit to operate in at least one a first state in which a current flows from the output port to the outside and a second state in which a current flows from the outside into the output port.
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Citations
19 Claims
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1. A magnetic sensor integrated circuit, comprising:
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a magnetic sensor receiving a constant current outputting a differential signal; a signal processing unit converting the differential signal into a magnetic field detection signal; and an output control circuit controlling, at least based on the magnetic field detection signal, the magnetic sensor integrated circuit to operate in at least one state of a first state in which a current flows from an output port of the magnetic sensor integrated circuit to an outside of the magnetic sensor integrated circuit and a second state in which a current flows from the outside into the output port; and wherein the differential signal comprises a magnetic field signal and an offset signal, the signal processing unit comprises a first chopping switch to modulate the magnetic field signal and the offset signal to a high-frequency region and a baseband frequency respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification