Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2006-09-12
2006-09-12
Epps, Georgia (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S2140AG
Reexamination Certificate
active
07105797
ABSTRACT:
The current-voltage converting circuit converts an input current signal into a voltage signal, and the single-differential converting circuit converts the voltage signal into differential signals so as to output the differential signals. The first and second low-pass filters input outputs from the single-differential converting circuit, respectively, and the voltage-current converting circuit converts a difference between the output voltages from the first and second low-pass filters into a current signal. The current-voltage converting circuit inputs a voltage held in the hold capacitor as a control signal and converts the input current signal into a voltage signal using a current-voltage converting gain according to the control signal.
REFERENCES:
patent: 3634747 (1972-01-01), Loftus
patent: 6084478 (2000-07-01), Mayampurath
patent: 6342694 (2002-01-01), Satoh
patent: 6832054 (2004-12-01), Kim
patent: 06-85556 (1994-03-01), None
Epps Georgia
Matsushita Electric - Industrial Co., Ltd.
Williams Don
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