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:
Mar. 31, 1987
Filed:
Apr. 15, 1985
Applicant:
Inventor:
Richard I Ely, Flemington, NJ (US);
Assignee:
Burroughs Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455617 ; 2502 / ; 330 59 ; 330291 ; 330308 ; 455619 ;
Abstract
An electro-optical system includes a phototransistor having collector and emitter electrodes and adapted to receive modulated light representing data and generating current in a current flow path representative of the received light. A load is placed in the current flow path and generates a voltage due to the current flow, and means are provided for sensing the generated voltage and using that voltage in a feedback circuit to the phototransistor to maintain the collector base junction voltage of the phototransistor constant.