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:
Aug. 27, 1991
Filed:
Feb. 13, 1990
Applicant:
Inventors:
Masao Uno, Nagaokakyo, JP;
Takashi Hiroshima, Nagaokakyo, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D / ; H03K / ;
U.S. Cl.
CPC ...
307529 ; 3072191 ; 307271 ; 328 15 ; 328156 ; 333218 ;
Abstract
A UHF band transistor mixer circuit includes a frequency converting transistor to a base of which a received high-frequency signal and a local oscillation signal are applied. A collector of the frequency converting transistor is connected to a low-pass filter from which a desired frequency signal, i.e., an intermediate frequency signal is outputted. A series resonance circuit having a series resonance frequency point existing in a frequency region between both the signals is connected between an emitter of the frequency converting transistor and a reference potential.