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. 10, 1982
Filed:
Oct. 09, 1980
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03D / ; H03C / ; H03C / ;
U.S. Cl.
CPC ...
455326 ; 455319 ; 455333 ;
Abstract
A balanced modulator for use at the mixer stage of the front end of a signal receiver. The modulator has a transistor balanced modulation circuit of the double balanced type having a plurality of emitter coupled transistor pairs, a circuit for increasing the bias current in the balanced modulation circuit corresponding to an increase in the input signal level, and a circuit for reducing the local oscillation signal applied to the balanced modulation circuit corresponding to an increase in the input signal level so that distortion in the balanced modulation circuit is reduced over a wide range of the level of the input signal.