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:
Feb. 06, 2001
Filed:
Aug. 17, 1998
Applicant:
Inventors:
John Robert Siomkos, Royal Palm Beach, FL (US);
Edgar Herbert Callaway, Jr., Boca Raton, FL (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03G 3/18 ; H04B 1/06 ;
U.S. Cl.
CPC ...
H03G 3/18 ; H04B 1/06 ;
Abstract
An amplifier circuit (,) uses a series transistor (,) to couple the output of an amplifier (,) to a tuned circuit load (,) and to act as a variable resistance. In one embodiment for a multi-band receiver, multiple series transistors (,) are switched for connecting different tuned circuits (,) to the amplifier's output, and an activated one of the series transistors receives a gate voltage that varies its resistance so as to achieve gain control. An activated series transistors can also provide a resistance that stabilizes the amplifier (,).