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. 29, 1985
Filed:
Feb. 03, 1984
Applicant:
Inventor:
Michinori Naito, Tokyo, JP;
Assignee:
Trio Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04H / ;
U.S. Cl.
CPC ...
381 13 ; 455 63 ;
Abstract
A stereo multiplex circuit which can reduce a distortion of an FM demodulated signal to be generated due to nonlinearity of the frequency vs. amplitude/phase characteristics of a band-pass filter at an intermediate frequency amplifier stage of an FM receiver. This circuit includes a circuit for multiplying signals consisting of right-channel and left-channel signals and for adjusting the level of this multiplication signal into a suitable magnitude and thereafter inserting into the right and left channels, thereby causing a harmonic distortion to disappear.