US 11,940,503 B2
Magnetic sensor circuit and magnetic field detection device
Tatsunori Shino, Ichihara (JP)
Assigned to Resonac Corporation, Tokyo (JP)
Filed by SHOWA DENKO K.K., Tokyo (JP)
Filed on Jul. 14, 2021, as Appl. No. 17/375,367.
Claims priority of application No. 2020-134148 (JP), filed on Aug. 6, 2020.
Prior Publication US 2022/0043076 A1, Feb. 10, 2022
Int. Cl. G01R 33/06 (2006.01)
CPC G01R 33/063 (2013.01) 4 Claims
OG exemplary drawing
 
1. A magnetic sensor circuit comprising:
a first element including only a capacitor;
a second element including a magnetic sensor sensing a magnetic field by a magnetic impedance effect;
a third element including only a capacitor; and
a fourth element including a magnetic sensor sensing a magnetic field by a magnetic impedance effect, wherein
a first series circuit part including the first element and the second element that are connected in series and a second series circuit part including the third element and the fourth element that are connected in series are connected in parallel, and,
in a case where the magnetic field sensed by the magnetic sensor has a predetermined reference value, a product of impedance Z1 of the first element and impedance Z4 of the fourth element and a product of impedance Z2 of the second element and impedance Z3 of the third element are equal.