Method for determining the angular position of a rotating...

Details Method for determining the angular position of a rotating... Method for determining the angular position of a rotating...

2007-04-24

2007-04-24

Patidar, Jay M. (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207200, C324S207150

Reexamination Certificate

active

11235712

ABSTRACT:
A method for determining the angular position of a rotating object and rotary encoder is disclosed. In one embodiment, the method includes a method for determining the angular position of an object rotating about a rotation axis in a rotation direction and having a coding pattern, using a sensor that senses the coding pattern, including ascertaining the coarse angular position of the rotating object with respect to the sensor whilst taking account of the coding pattern at a first instant. The exact angular position of the rotating object is ascertained with respect to the sensor whilst taking account of the coarsely ascertained angular position and also whilst taking account of at least one section of the coding pattern which extends counter to the rotation direction proceeding from that location of the coding pattern which is assigned to the coarse angular position. An output signal is provided containing items of information about the exact angular position of the rotating object with respect to the sensor.

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Michael Q. Le et al., “An Analog DFE for Disk Drives Using a Mixed-Signal Integrator”, Solid-State Circuits Research Lab Department of Electrical and Computer Engineering.

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