Angle determining apparatus and angle determining system

Details Angle determining apparatus and angle determining system Angle determining apparatus and angle determining system

2005-11-29

2005-11-29

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207200

Reexamination Certificate

active

06969988

ABSTRACT:
An angle detection apparatus for detecting an angle of a rotatable magnetic field source comprises first and second magnetic sensor units for detecting first and second magnetic components of the magnetic field of the magnetic field source, driving means for driving the first and second magnetic sensor unit and control means. The control means control an output signal of the first magnetic sensor unit so as to have a fixed value and the driving means drive the second magnetic sensor unit according to the same drive conditions as those applied to the first magnetic sensor unit at the time when the first magnetic sensor unit is controlled by said control means so that an output signal of the second magnetic sensor unit is proportional to the tangent of said angle.

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Alberto Bilotti, Gerardo Monreal, and Ravi Vig, “Monolithic Magnetic Hall Sensor Using Dynamic Quadrature Offset Cancellation”, published by Allegro MicroSystems, Inc., Technical Paper STP 97-10.

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