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. 10, 1983
Filed:
Mar. 04, 1981
Applicant:
Inventor:
Bert K Erickson, Fayetteville, NY (US);
Assignee:
General Electric Company, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455182 ; 455192 ; 455197 ;
Abstract
An AM superheterodyne radio receiver has an RF filter which includes a biased varactor for providing a trimming capacitance and provides an AGC signal when it is tuned to a broadcast AM signal. The AGC signal and a derived time derivative signal are used to provide binary signals which drive a logic circuit and the logic circuit controls a generator which biases the varactor. The biased varactor fine tunes the RF filter towards the carrier frequency of the broadcast AM signal.