Encoder having a signal elimination unit

Details Encoder having a signal elimination unit Encoder having a signal elimination unit

2007-08-14

2007-08-14

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Digital pattern reading type converter

C341S013000

Reexamination Certificate

active

11290237

ABSTRACT:
An encoder includes an encoder scale having a predetermined cyclic pattern, and at least one detection unit configured to detect a cyclic displacement according to movement of the encoder scale. The encoder further includes a signal elimination unit configured to subtract, from an output signal of the at least one detection unit, one of an entirety of a DC signal component, which is free from dependency on a relative displacement of the encoder scale, and a signal component that is proportional to the DC signal component.

REFERENCES:
patent: 4360730 (1982-11-01), Breslow
patent: 7145128 (2006-12-01), Tanaka
patent: 2004/0200958 (2004-10-01), Tanaka et al.
patent: 06-026817 (1994-02-01), None

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