The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 1987
Filed:
Jun. 13, 1985
Applicant:
Inventors:
Philippe Faugeras, Boulogne Billancourt, FR;
Daniel Tribet, Epinay sur Orge, FR;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250209 ; 250578 ;
Abstract
An opto-electronic selector having matrix-addressed photodetectors is characterized in that the photodetectors (Ph) are followed by individual amplifiers (PA), each of which is powered at constant voltage by a voltage source under the control of a matrix line selection control (X) and at constant current from a current source proper to said amplifier and capable of being switched on under the control of a matrix column selection (Y), thereby forming a switching cell (C) in conjunction with the associated photodetector. Such a detector may be used in broadcasting programs to subscribers.