Magnetic sensor integrated circuit, motor assembly and application device
First Claim
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1. A magnetic sensor integrated circuit, comprising:
- a magnetic sensing element detecting a polarity of an external magnetic field and outputting a magnetic field sensing signal;
a signal processor processing the magnetic field sensing signal and outputting a magnetic field detection signal; and
a current source generator outputting a constant current, which is not influenced by a temperature, to the magnetic sensing element, wherein the current source generator comprises a voltage source, at least one ordinary resistor connected in series to the voltage source and a temperature compensating resistor connected to the voltage source, and the voltage source outputs the constant current to the magnetic sensing element via the temperature compensating resistor, and outputs at least one current to the signal processor via the at least one ordinary resistor;
wherein the at least one ordinary resistor is connected with the temperature compensating resistor in parallel;
wherein the sensitivity of the magnetic sensing element is substantially maintained as a temperature changes when being driven by the constant current.
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Abstract
A magnetic sensor integrated circuit is provided, which includes: a magnetic sensing element to detect change in an external magnetic field to output a magnetic field sensing signal; a signal processor to process the magnetic field sensing signal and output a magnetic field detection signal; and a current source generator to output a constant current to the magnetic sensing element. The constant current is not influenced by a temperature.
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Citations
14 Claims
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1. A magnetic sensor integrated circuit, comprising:
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a magnetic sensing element detecting a polarity of an external magnetic field and outputting a magnetic field sensing signal; a signal processor processing the magnetic field sensing signal and outputting a magnetic field detection signal; and a current source generator outputting a constant current, which is not influenced by a temperature, to the magnetic sensing element, wherein the current source generator comprises a voltage source, at least one ordinary resistor connected in series to the voltage source and a temperature compensating resistor connected to the voltage source, and the voltage source outputs the constant current to the magnetic sensing element via the temperature compensating resistor, and outputs at least one current to the signal processor via the at least one ordinary resistor;
wherein the at least one ordinary resistor is connected with the temperature compensating resistor in parallel;
wherein the sensitivity of the magnetic sensing element is substantially maintained as a temperature changes when being driven by the constant current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification