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:
Apr. 20, 2004
Filed:
Feb. 21, 2002
Applicant:
Inventors:
David Q. Ngo, Phoenix, AZ (US);
Mike B. Thomas, Chandler, AZ (US);
Christopher B. Foye, Jamestown, NC (US);
Assignee:
RF Micro Devices, Inc., Greensboro, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03G 9/00 ; H03G 3/20 ; H03G 5/16 ; H03F 1/14 ;
U.S. Cl.
CPC ...
H03G 9/00 ; H03G 3/20 ; H03G 5/16 ; H03F 1/14 ;
Abstract
An amplifier chain that switches between a saturated mode of operation and a linear mode of operation comprises at least two amplifier stages. A switch is associated with the first amplifier stage and dampens the gain of the amplifier chain when the switch is closed. In a first embodiment, this is done by bypassing the first amplifier stage. In second and third embodiments, this is done by providing a feedback loop to the first amplifier stage. Dynamic device scaling and changing the bias may also be used to affect the performance of the amplifier chain.