Signal conditioning for an optical encoder

Details Signal conditioning for an optical encoder Signal conditioning for an optical encoder

2007-03-22

2009-06-30

Epps, Georgia Y (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231130, C341S013000, C356S617000

Reexamination Certificate

active

07554079

ABSTRACT:
An encoder with signal conditioning of an emitter drive signal is described. In one embodiment, the encoder includes a peak comparator, a pulse generator, a threshold comparator, and digital circuitry. The peak comparator outputs a peak comparator signal based on a comparison of an input sinusoidal signal stored at a first time with the input sinusoidal signal stored at a second time. The pulse generator determines a peak of the input sinusoidal signal based on the peak comparator signal. The threshold comparator compares a differential signal amplitude with a differential signal amplitude window at approximately the peak of the input sinusoidal signal. The differential signal amplitude is associated with the input sinusoidal signal. The digital circuitry generates an emitter modification signal in response to a determination that the differential signal amplitude is outside of the differential signal amplitude window.

REFERENCES:
patent: 4839834 (1989-06-01), Omae et al.
patent: 4903273 (1990-02-01), Bathe
patent: 5241173 (1993-08-01), Howley et al.
patent: 5444613 (1995-08-01), Tani et al.
patent: 6407633 (2002-06-01), Dao
patent: 6664841 (2003-12-01), Cetin et al.
patent: 2004/0172208 (2004-09-01), Freitag et al.
patent: WO 99/39439 (1999-08-01), None
Avago Technologies, “AEDA-330 Series, Ultra Miniature, High Resolution Incremental Kit Encoders”, Mar. 23, 2006, p. 1-10.
iC-Haus, “iC-MSB SIN/COS Signal Conditioner with 1Vpp Driver”, 2006, p. 1-23.

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