| 摘要 |
PURPOSE: A magnetic sensor circuit is provided to reduce power consumption. CONSTITUTION: A hole device(25) generates a hole voltage by magnetism. An amplification circuit(26) amplifies the hole voltage. A sample hold circuit samples the hole voltage and a reference voltage amplified during sampling. A comparison circuit(21) compares an amplified hole voltage after sampling with a reference voltage after sampling and outputs an output voltage based on the comparison result. A control circuit(23) controls the hole device and the amplification circuit to be in an active state during sampling and controls the comparison circuit to be in an active state during the comparison.
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