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:
Sep. 28, 1982
Filed:
May. 16, 1980
Applicant:
Inventors:
Masaki Kato, Soma, JP;
Katsumi Tobita, Soma, JP;
Assignee:
Alps Electric Company, Ltd., Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03J / ; H03J / ;
U.S. Cl.
CPC ...
455183 ; 455184 ; 455185 ; 455196 ;
Abstract
A tuning system comprising a memory for storing therein local oscillation frequencies of a plurality of channels to be received and an intermediate frequency, a first control loop circuit for controlling an oscillation frequency of a controlled oscillator on the basis of one local oscillation signal stored in said memory, and a second control loop circuit for controlling a controlled oscillator in such a manner as to render the intermediate frequency of the tuner itself constant on the basis of the intermediate frequency stored in said memory after said first control loop circuit is locked.