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:
May. 19, 2009
Filed:
Feb. 27, 2007
Xinghao Chen, Endwell, NY (US);
Yanbo Tian, Summit, NJ (US);
Norman Scheinberg, South River, NJ (US);
Xinghao Chen, Endwell, NY (US);
Yanbo Tian, Summit, NJ (US);
Norman Scheinberg, South River, NJ (US);
Other;
Abstract
An architecture and method for improving efficiency of a Class-A power amplifier by dynamically scaling biasing current thereof as well as synchronously compensating gain thereof in order to maintain overall constant gain of the Class-A power amplifier at all biasing configurations thereof. A biasing-current switching-network is operatively connected to the back-end block of the Class-A power amplifier. A gain-control switching-network is operatively connected to a front-end block of the Class-A power amplifier. A detector-and-control block is operatively connected to an output of the back-end block of the Class-A power amplifier, and samples a signal that is then compared with reference signals to determine switching configurations in the biasing-current switching-network and the gain-control switching network when the signal is processed through the front-end block of the Class-A power amplifier followed by the back-end block of the Class-A power amplifier. The biasing-current switching-network dynamically sets the back-end block biasing current of the Class-A power amplifier for a highest possible operating efficiency. The gain-control network simultaneously adjusts gain of the front-end block of the Class-A power amplifier to synchronize with a dynamic-biasing current-switching configuration to allow overall gain of the Class-A power amplifier to be constant in all biasing conditions.