Resources Contact Us Home
High efficiency amplification

Image Number 8 for United States Patent #7482869.

A radio frequency amplification stage including an amplifier for receiving an input signal to be amplified and a power supply voltage; and a power supply voltage stage for supplying said power supply voltage, including a circuit for providing a reference signal representing the envelope of the input signal; a circuit for selecting one of a plurality of supply voltage levels in dependence on the reference signal; and a circuit for generating an adjusted selected power supply voltage, including an ac amplifier for amplifying a difference between the reference signal and one of the selected supply voltage level or the adjusted selected supply voltage level, and a summer for summing the amplified difference with the selected supply voltage to thereby generate the adjusted supply voltage.

  Recently Added Patents
Antibody recognizing turn structure in amyloid .beta.
Method for manufacturing a turbine engine vane
Method and system for utilizing Perovskite material for charge storage and as a dielectric
Methods and compositions for inhibition of neutrophil exocytosis
Transferases and oxidoreductases, nucleic acids encoding them and methods for making and using them
Generating network topology parameters and monitoring a communications network domain
  Randomly Featured Patents
Lens-attached light-emitting element
Enhancements to periodic silences in wireless communication systems
System for use in a dialysis apparatus
Advanced cooling for an interactive display
Detailing glove
Deep well sparging
Installation for producing wort
Packed column vaporizer and vaporizing process
Multi-degree of freedom mount