Tokyo Institute of Technology

Alps Alpine Co., Ltd.

Nisshinbo Micro Devices Inc.

Chunhui Pan

Hiroki Sato

Masayuki Sato

Shinji Murata

Noboru Ishihara

Takaaki Shirakawa

A sensor interface circuit includes a frequency synchronization circuit connectable to a sensor. The frequency synchronization circuit includes: a reference voltage source generating a reference voltage; a current source connected to the reference voltage source, and generating a current by using the reference voltage; a voltage difference detection circuit including first and second input nodes and an output node, generating a control voltage according to a difference between voltages received at the first and second input nodes, one of the voltages received at the first and second input nodes corresponding to a detection value of the sensor; a voltage-controlled oscillation circuit connected to the output node, and generating an oscillation signal according to the control voltage; and a frequency/impedance conversion circuit connected between the voltage-controlled oscillation circuit and the second input node, and converting a frequency of a signal according to the oscillation signal into impedance.

Sensor interface circuit and sensor module

Growing community of inventors

Tokyo, Japan

Chunhui Pan