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. 06, 1977
Filed:
Mar. 11, 1974
Applicant:
Inventor:
Yoichi Sakamoto, Toyonaka, JA;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
325455 ; 325465 ; 334 15 ; 358191 ; 358192 ;
Abstract
This invention relates to a channel selector provided with a tuning circuit using variable capacitance elements as tuning elements, and has for its primary object the provision of such a channel selector in which bias voltages applied to the variable capacitance elements are preset so that one of these preset bias voltages may be selected by a binary memory circuit and a diode matrix circuit, the selection of the preset voltages disposed in a predetermined sequence may be effected in any desired direction, and one of the bias voltages corresponding to a desired channel may be automatically selected.