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:
Oct. 23, 1984
Filed:
Feb. 25, 1982
Patrick D Griffis, Indianapolis, IN (US);
RCA Corporation, New York, NY (US);
Abstract
A system for synthesizing stereophonic signals from an audio information signal source is provided. The system includes a transfer function circuit for producing a modulated signal which varies in amplitude as a function of frequency in response to the audio signal, first and second amplifiers for providing amplified output signals, and a switch circuit for coupling selected ones of the audio signal and the modulated signal to the inputs of the first and second amplifiers. In a first position, the switch circuit causes the first and second amplifiers to operate in a matrix mode for matrixing the input signals to provide first and second synthesized stereophonic output signals, and in a second position, the switch circuit causes the amplifiers to operate in a non-matrix mode with respect to the input signals supplied thereto for providing an amplified audio output signal.