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. 30, 1993
Filed:
May. 21, 1991
Mark R Anderson, Indianapolis, IN (US);
John A Andrews, Greenwood, IN (US);
Thomson Consumer Electronics, Inc., Indianapolis, IN (US);
Abstract
An audio signal processing channel includes a bias network for deriving a bias voltage which is coupled to a point within the channel from the supply voltage. In order to inhibit audible transients or 'pops' due to the rapid reduction of the bias voltage when the voltage supply is deenergized, a diode is coupled between the bias network and the voltage supply so as to selectively decouple a filter capacitor of the bias network from the voltage supply and associated loads when the voltage supply is deenergized. As a result, the bias voltage is gradually reduced at a controlled rate of change which is independent of the impedances of voltage supply and associated loads. Such a 'pop' suppression arrangement is particularly desirable when it is not possible or practical to 'mute' the output amplifier of the channel.