Title:
SENSOR AMPLIFICATION CIRCUIT, SENSOR SYSTEM, AND SENSOR AMPLIFICATION CIRCUIT CALIBRATION METHOD
Document Type and Number:
WIPO Patent Application WO/2024/071016
Kind Code:
A1
Abstract:
This sensor amplification circuit (100), which is for amplifying an output signal from a magnetic sensor circuit (50), comprises: a first operational amplifier 111 which amplifies the output signal from a magnetic sensor circuit (50); and a correction circuit (150) which corrects a non-linear distortion included in the output signal, wherein the magnetic sensor circuit (50) outputs a first signal of the magnitude corresponding to a magnetic field of a first range in a first magnetic field area to which the magnetic field of a first range is applied, and outputs a second signal of the magnitude corresponding to a magnetic field of a second range in a second magnetic field area to which the magnetic field of a second range, which is greater than the magnetic field of a first range, is applied. The correction circuit (150) is configured to switch from a first state where the nonlinear distortion included in the output signal is not corrected to a second state for correcting the nonlinear distortion included in the output signal, and the correction circuit (150) is switched to the second state from the first state when the output signal from the magnetic sensor circuit (50) is changed to the second signal from the first signal.
Inventors:
NARITA TETSUYA (JP)
Application Number:
PCT/JP2023/034667
Publication Date:
April 04, 2024
Filing Date:
September 25, 2023
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
G01R33/02; G01R33/09; G01R35/00
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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