Crowell & Moring LLP
Angular position sensor and rotation control device
An angular position sensor has a sensor element detects changes of magnetic field strength of a magnet that rotates in synchronization with a rotating body, for detecting its angular position. A circuit is provided for compensating hysteresis characteristics of an output of the sensor element in both the clockwise and counterclockwise rotation directions, using different coefficients for compensation approximated by different functions, depending on whether said rotating body rotates clockwise or counterclockwise.
Hitachi, Ltd.
G
G01D
inventional
Masashi
Saito