JAMES M ROCHE
Accountancy in Franklin, MA
License number
Massachusetts 13498
Issued Date
May 4, 1990
Expiration Date
Jun 30, 2017
Type
Certified Public Accountant
Address
Address
Franklin, MA 02038
Professional information
Multi-Mode Power Amplifier
US Patent:
2006013, Jun 22, 2006
Filed:
Dec 17, 2004
Appl. No.:
11/016397
Inventors:
Atiqul Baree - Methuen MA, US
Gary Hau - Nashua NH, US
Mikhail Shirokov - Methuen MA, US
James Roche - Franklin MA, US
Gary Hau - Nashua NH, US
Mikhail Shirokov - Methuen MA, US
James Roche - Franklin MA, US
International Classification:
H03F 1/14
US Classification:
330051000
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.