Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1984-06-27
1986-12-23
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
358213, H04N 5335
Patent
active
046314172
ABSTRACT:
An addressable photodetector array comprises row addressing lines, column addressing lines, an output line and a biasing line common to all the photodetectors. It further comprises a respective addressing circuit associated with each photodetector. The addressing circuit comprises a first transistor, a second transistor, a first series circuit controlling the second transistor and a second series circuit controlling the first transistor and the first circuit according to a signal on a row addressing line and a signal on a column addressing line.
REFERENCES:
patent: 3465293 (1969-09-01), Weckler
patent: 3715485 (1973-02-01), Weimer
patent: 4109284 (1978-08-01), Tompkins
patent: 4571624 (1986-02-01), Nishizawa et al.
Allen S.
Compagnie Industrielle des Telecommunications Cit-Alcatel
Nelms David C.
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