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:
Aug. 20, 1991
Filed:
Jan. 18, 1991
Applicant:
Inventors:
Mark A Scholten, Rolling Meadows, IL (US);
Stanley R Zachary, Roselle, IL (US);
Assignee:
Zenith Electronics Corporation, Glenview, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04S / ;
U.S. Cl.
CPC ...
381-1 ; 381 28 ;
Abstract
A television receiver includes a stereo amplifier having separate bass, treble and gain controls, for driving left and right channel loudspeakers. Separate bandpass circuits supply portions of the respective channel signals for phase inversion and feed back to respective summation circuits in the outputs of the corresponding opposite channel to produce an extended stereo effect. A switch simultaneously activates the syereo extender circuitry and operatively couples the bass and treble controls to the gain control for extending the frequency response characteristic and the volume level of the channels.