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. 15, 1979
Filed:
Apr. 18, 1977
Applicant:
Inventor:
Yoichi Sakamoto, Takatsuki, JP;
Assignee:
Matsushita Electric Industrial Co. Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
325470 ; 325464 ;
Abstract
A channel selection apparatus of the scanning tuning type in which a tuning frequency is swept by a sweeping voltage to select a given tuning frequency. The sweep of the frequency is controlled for each channel by a control signal stored for each channel in the form of a number of pulses to attain exact instant tuning to a specified channel. An operating unit which compensates for temperature drift of the elements comprising the apparatus is provided to correctly compensate for temperature drift of these elements thereby attaining exact tuning.