Optical detector apparatus

Details Optical detector apparatus Optical detector apparatus

2005-03-29

2005-03-29

Smith, Zandra V. (Department: 2877)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C341S013000

Reexamination Certificate

active

06872934

ABSTRACT:
In a detector apparatus, voltage signals of phase A and phase B are mixed, the mixed signal is divided to obtain a low-voltage signal, and the low-voltage signal is integrally smoothed. The integrally smoothed low-voltage signal is added to each of the voltages obtained by smoothing the voltage signals of the phase A and phase B. The results are used as threshold voltages of comparators constituting a wave-shaping circuit. The threshold voltages change in accordance with the voltage signals of phase A and phase B, achieving a high accuracy of binarization even when the voltage signals Sa and Sb have variations.

REFERENCES:
patent: 5644127 (1997-07-01), Ohmae
patent: 6252584 (2001-06-01), Wu
patent: 6323786 (2001-11-01), Sakuma et al.

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