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:
Jan. 02, 2007
Filed:
Dec. 17, 2004
Atiqul Baree, Methuen, MA (US);
Gary Hau, Nashua, NH (US);
Mikhail Shirokov, Methuen, MA (US);
James A. Roche, Jr., Franklin, MA (US);
Atiqul Baree, Methuen, MA (US);
Gary Hau, Nashua, NH (US);
Mikhail Shirokov, Methuen, MA (US);
James A. Roche, Jr., Franklin, MA (US);
Fairchild Semiconductor Corporation, South Porland, ME (US);
Abstract
A power amplifier includes an input network, output stages, coupled in parallel and configured to output power optimally in corresponding power-ranges, the output stages coupled to the input network, an output impedance matching network, coupled to the output stages and not containing a switching element, and a bias-control network, coupled between the output impedance matching network, the input network, and the output stages. In some amplifiers the output impedance matching network does not contain a switching element corresponding to the output stage configured to output power in the highest range. In other amplifiers the bias-control network is configured to isolate output stages by providing a hard shut-off to transistors of the isolated output stages.