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:
May. 21, 1985
Filed:
Jun. 23, 1983
Rudolf P Koppe, Breda, NL;
Hendrik Blom, Breda, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A signal processing system comprising a signal source (CAM), a signal processing unit (CPU) and connecting cables (CC1-CC5) having different lengths. A series circuit comprising a switchable signal attenuator (ATT), a low-noise, non-controlled signal amplifier (AMP2) and a AGC-signal amplifier (AMP1) is present to compensate for the variable cable losses. A change-over input (ST) of the signal attenuator (ATT) is coupled to a change-over circuit (ATS) which has a locking input (LT) and a measuring signal input (DT). The measuring signal input (TD) is coupled directly to a signal detection circuit (DET). A second output of the signal detection circuit is coupled to the locking input (LT), through a time signal generator (TSG). After a time delay of several dozen seconds, locking is effected, and the signal attenuator (ATT) can no longer switch-over during the normal signal processing operation and impermissible sudden signal amplitude changes are prevented.