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. 05, 2000
Filed:
Dec. 05, 1997
Applicant:
Inventors:
Brian Carroll, Coopersburg, PA (US);
Steven M Corso, Philadelphia, PA (US);
David E Zeidler, Warrington, PA (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
381 945 ; 381 81 ;
Abstract
A circuit connected between an audio signal receiver and an audio output unit can prevent an audio pop from being emitted by a speaker associated with the audio output unit. The circuit interrupts the output of the signal receiver when the DC voltage level of the system suddenly changes, e.g. when a different audio signal is selected or when the receiver is powered on or off. The output of the receiver is shunted through a resistor to ground until a blocking capacitor between the receiver and audio output unit can charge to the new DC voltage level.