Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2007-07-17
2007-07-17
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C341S164000
Reexamination Certificate
active
11289696
ABSTRACT:
A semiconductor integrated circuit device is provided which has a plurality of photo detector circuits and a plurality of processing elements. Each of the photo detector circuits includes a comparing circuit, which compares an output of a photo detector element with a reference voltage. A/D conversion is performed by counting the elapsed time until the output of the photo detector element drops below the reference voltage, and a level of the reference voltage as a function of time to be applied to the comparing circuit and time intervals of the counting are uniquely determined based on given quantization intervals of an amount of current generated by the photo detector element. In addition, the photo detector elements may be reset locally based on the result of the corresponding processing element.
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Ishii Idaku
Ishikawa Masatoshi
Kagami Shingo
Komuro Takashi
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Luu Thanh X.
Semiconductor Technology Academic Research Center
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