Signal processing method using comparator level adjustment in a

Details Signal processing method using comparator level adjustment in a Signal processing method using comparator level adjustment in a

1994-09-20

1996-01-09

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, 356356, G01D 534

Patent

active

054830591

ABSTRACT:
There are disclosed a signal processing method, and a displacement information measuring apparatus utilizing such method, capable of providing highly reliable binary signals even in the presence of a time-dependent variation in the light emission intensity of the light source, a variation in the emission intensity resulting from a variation in the external temperature, or a variation in the optical transmittance resulting from smear on the optical scales, thereby enabling highly precise detection of the displacement information of the movable member.

REFERENCES:
patent: 4496835 (1985-01-01), Boella et al.
patent: 4650332 (1987-03-01), Muraoka et al.
patent: 4767925 (1988-08-01), Kawamoto
patent: 5057686 (1991-10-01), Hikawa et al.
patent: 5066129 (1991-11-01), Matsui
patent: 5124548 (1992-06-01), Igaki

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