Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2006-04-18
2006-04-18
Porta, David (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
Reexamination Certificate
active
07030360
ABSTRACT:
A photoreceptor is provided with an erroneous operation detection circuit for monitoring an output signal supplied from a slew rate variable output stage. The erroneous operation detection circuit performs such controls that a slew rate of output is decreased within a range in which a transmission speed of the slew rate variable output stage is not decreased. With this arrangement, it is possible to inhibit adverse effect on the output signal due to a parasite current caused between an output terminal of the photoreceptor and photoelectric converting means, such as a photodiode.
REFERENCES:
patent: 3018541 (2000-01-01), None
Murata Takeshi
Shimizu Takayuki
Ko Tony
Nixon & Vanderhye P.C.
Porta David
Sharp Kabushiki Kaisha
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