Title: Magnetic sensor
Application Number: 98802893 Application Date: 1998.02.27
Publication Number: 1249038 Publication Date: 2000.03.29
Approval Pub. Date: 2003.10.15 Granted Pub. Date: 2003.10.15
International Classifi-cation: G01R33/07;H01L43/06
Applicant(s) Name: Asahi Kasei Electronics Co., Ltd. Address:
Inventor(s) Name: Ishibashi Kazutoshi;Shibasaki Ichiro
Attorney & Agent: wang sibeng
Abstract:
    A magnetic sensor with a signal processing circuit which is constituted of a magnetic sensor section (4) formed from a compound semiconductor thin film or magnetic thin film, and a signal processing circuit (5) which amplifies a magnetic signal detected as an electrical output by the magnetic sensor section (4) and which is constituted of an operational amplifier circuit (51) and a constant current circuit (52) for feedback. The constant current circuit (52) in the signal processing circuit (5) has a plurality of resistors of two or more different temperature coefficients. The current output by the constant current circuit is characterized by that it has a temperature coefficient inversely proportional to that of a combined resistor of a plurality of the resistors.
Time: 49