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:
Jul. 17, 1984
Filed:
Oct. 09, 1981
Applicant:
Inventors:
Kenzo Tanabe, Katano, JP;
Junji Suzuki, Katano, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455333 ; 455332 ;
Abstract
A frequency mixer or converter which is applicable for use in superheterodyne radio frequency signal receivers and has good linearity characteristics as well as a low noise characteristic. The mixer utilizes a balanced transistor pair arrangement with an RC highpass filter but does not use a differential amplifier for amplifying the radio frequency signals. This results in a mixer having good low noise characteristics and good linearity as well as high attenuation of spurious intermediate frequency signals. In addition, the design is amenable to fabrication by integrated circuit technology.