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
Mechanisms for marking the orientation of a sawed die
System and method for associating financial transaction data with user's project data
Coating composition, and a process for producing the same
Systems of an electronic device and methods for manufacturing the same
Method and system for electronic distribution of product redemption coupons
Dental plier
Clock face
  Randomly Featured Patents
Method for determining a property of a fluid for a household device
Island cutting method
Control mechanism for operating a tractor
Sensor for electrometric measurement
Foldable shelving unit
Particulate collection and dewatering means for airborne particulate matter
Signal generating/position controlling system
Semiconductor device and method of manufacturing same
Counting device