Resources Contact Us Home
Power amplifier control technique for enhanced efficiency

Image Number 2 for United States Patent #7193459.

A power amplifier configuration including power amplifier circuitry and power control circuitry and having improved Power Added Efficiency (PAE) is provided. The power amplifier circuitry includes one or more input amplifier stages in series with a final amplifier stage. The power control circuitry provides a variable supply voltage to the input amplifier stages based on an adjustable power control signal. The final amplifier stage is powered by a fixed supply voltage. In operation, as output power of the power amplifier is reduced from its highest power level, the variable supply voltage is reduced. Accordingly, RF power of an amplified signal provided to the final amplifier stage from the input amplifier stages decreases, and the final amplifier stage transitions from saturation to linear operation, thereby increasing the gain of the final amplifier stage. Thus, a desired output level can be maintained while operating at lower current levels.

  Recently Added Patents
Catalysts for hydrodeoxygenation of polyols
Transporting business intelligence objects between business intelligence systems
Delivery of captions, content advisory and other data through digital interface
Method of controlling mechanical mechanisms of optical storage apparatus for peak power/current reduction, and related optical storage apparatus and machine-readable medium
Efficient implementation of hash algorithm on a processor
System for seeking for an optimal configuration of a bi-, tri- or multi-ventricular cardiac resynchronization implanted device
Managing job execution
  Randomly Featured Patents
Texture features for biometric authentication
Constrained compounds as CGRP-receptor antagonists
Motor driven hose reel
Heterodyne commutating mixer apparatus
Telecommunication feature for exchange of translation information between a computer and a telecommunication switching system
Fast response fluid flow control valve/nozzle
Adjustable scaffold
Modular case for holding articles
Differential pressure transducer
Disk magazine and disk loading device