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
Policy based cryptographic application programming interface in secure memory
Making transparent capacitor with multi-layer grid
Method for evaluating performance characteristics of dental curing lights
Automated hotfix handling model
Cross-linkable compositions
Establishing a social network
Method of publicly displaying a person's relationship status
  Randomly Featured Patents
Tensioner lever for chain drive
Transistor group mismatch detection and reduction
Solenoid energization indicator with hold-down member for receiving bobbin assembly to rotatably adjusting the lamp position
Apparatus and method for generating a bias voltage
Alkaline liquid hand dish washing detergent composition
Pathway light fixture with interchangeable components
Wide frequency range delay locked loop
Transport of solutions of cellulose through pipes
Wind direction deflection blade mounting apparatus
Compositions and methods for anti-transpiration in plants