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:
Jun. 02, 1981
Filed:
Nov. 15, 1978
Applicant:
Inventors:
Gregoire Eumurian, Paris, FR;
Jean-Pol Levan, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04J / ;
U.S. Cl.
CPC ...
370 74 ; 333 15 ; 455234 ; 455249 ; 455619 ;
Abstract
Disclosed is a device for automatically controlling the gain of a receiving channel in a system comprising optical connections having a very wide pass band. The useful signal of unknown level is transmitted with a pilot signal of known level through an optical connection, where it undergoes an attenuation, to a receiving assembly connected to an opto-electronic transducer at the output of the optical channel. A device for controlling the gain of the receiving channel commanded by the pilot signal digitally controls an attenuation circuit which thereupon restores the useful signal to its initial level.