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:
Jan. 01, 1991
Filed:
Jun. 07, 1990
Applicant:
Inventor:
Syuuji Matsuura, Ikoma, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455188 ; 455190 ; 3581911 ;
Abstract
A television tuner combining a UHF tuner and a VHF tuner employs a single mixer circuit such that a signal amplified by a UHF amplifier circuit or a VHF amplifier circuit is selectively inputted through a switching diode to this mixer circuit where it is mixed with a local oscillator signal from a UHF or VHF local oscillator circuit and converted into an intermediate frequency signal.