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:
Jun. 15, 2004
Filed:
Apr. 30, 2002
Applicant:
Inventor:
Howard Patterson, Phoenix, AZ (US);
Assignee:
Freescale Semiconductor, Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/68 ;
U.S. Cl.
CPC ...
H03F 3/68 ;
Abstract
A power amplifier incorporates base ballasted hetero-junction bipolar transistors (HBTs) in parallel. A transistor pair adjusts the voltage applied to the base ballast if it senses that the voltage appearing between one of the HBT transistors and its base ballast is drooping to a level not strong enough to keep the HBTs active.