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:
Dec. 24, 1991
Filed:
Apr. 04, 1990
Philippe B Jouen, Caen, FR;
Peter J Sijbers, Panningen, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
The invention relates to a control circuit for amplified listening having a shunt regulator (A.sub.0, T.sub.1) controlling at a value V.sub.0 the supply voltage V.sub.B of an amplifier feeding a loudspeaker (1) for amplified listening, having a gain control input (G). When the regulator conducts an excessive current I.sub.s, a switch (20) is closed and a storage capacitor (C.sub.1g) is charged by a current source (SC). A threshold amplifier (A.sub.2) opens a transistor (T.sub.4) when the voltage V.sub.B falls below V.sub.1 (V.sub.1 <V.sub.0). The capacitor (C.sub.1g) is then rapidly discharged through resistor R.sub.1g (and R.sub.2g).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile