Magnetic sensor circuit and semiconductor device

摘要

A magnetic sensor circuit supplying an excitation current to an MI device, and having a detection signal supplied thereto corresponding to a magnetic field intensity from the MI device based on the excitation current, the magnetic sensor circuit includes a pulse current supplying circuit supplying a pulse current to the MI device; a sample-and-hold circuit maintaining an approximately peak value of the detection signal and outputting a hold signal; and a temperature compensation part compensating temperature characteristics of the magnetic sensor circuit with respect to the hold signal.