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:
May. 13, 1986
Filed:
Jun. 28, 1983
Applicant:
Inventors:
Masaki Noda, Yokohama, JP;
Keiro Shinkawa, Yokohama, JP;
Takeshi Saitoh, Tokyo, JP;
Hiroshi Hatashita, Yokohama, JP;
Shigeo Matsuura, Chigasaki, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04K / ; H04N / ;
U.S. Cl.
CPC ...
358118 ; 455208 ; 358123 ;
Abstract
A receiving circuit for receiving an FM-modulated television signal with an energy dispersal signal superposed thereon is used for a television receiver for receiving the FM-modulated television signal. The receiving circuit is provided with a triangle wave signal generator for generating a triangle wave signal in synchronism with a vertical synchronizing signal. The energy dispersal signal superposed on the FM-modulated television signal is suppressed by frequency modulating an oscillation signal of a local oscillator by the triangle wave signal obtained.