Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Portable stand
Redistribution layer (RDL) with variable offset bumps
Modified polyolefin resin for glass fiber treatment, surface-treated glass fiber, and fiber-reinforced polyolefin resin
Case for electronic device
Manipulation of an alternative respiratory pathway in photo-autotrophs
Method of fabricating crystal unit, crystal unit fabrication mask, and crystal unit package
Portable reading device with mode processing
  Randomly Featured Patents
Filtering and absorbing device for vehicle discharge pipe
Roller skate base plate
System and method for determining a gate position
Data-processing system
Spreader attachment
Field-release mass spectrometry
Methods for arbitrary peptide synthesis
Radio transceiver and related method of frequency control
Thermostat assembly for a marine engine with bypass
Compositions for prevention of chemically induced irritation and discolorations and methods of using same