Patent ID: 9557191
Date: 2017-01-31
CPC Classifications: G01D

Claim:
1. A rotating field sensor for detecting an angle that a direction of a rotating magnetic field in a reference position forms with respect to a reference direction, the rotating field sensor comprising: N detection circuits, each of the N detection circuits including at least one magnetic detection element and generating an output signal responsive to the direction of the rotating magnetic field; and a computing unit for performing a computation for determining an angle detection value to be output from the rotating field sensor, by using N output signals of the N detection circuits, the angle detection value having a correspondence relationship with the angle that the direction of the rotating magnetic field in the reference position forms with respect to the reference direction, wherein in the computing unit, G first detection circuit groups are defined and further, g second detection circuit groups are defined in each of the G first detection circuit groups, each of the G first detection circuit groups consisting of M detection circuits selected from the N detection circuits, each of the g second detection circuit groups consisting of m detection circuits selected from the M detection circuits, N is an integer not less than four, M is an integer not less than three and not more than (N−1), each of the N detection circuits belongs to one or more and not more than (G−1) of the G first detection circuit groups, m is an integer not less than two and not more than (M−1), g is an integer not less than M/m and not more than in each of the G first detection circuit groups, each of the M detection circuits belongs to one or more and not more than (g−1) of the g second detection circuit groups, and the computing unit includes: