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
Wide bandwidth hybrid antenna for combination EAS and RFID label or tag
Electrode material and use thereof for production of electrochemical cells
Bootstrap gate driver
Non-zero rounding and prediction mode selection techniques in video encoding
Electro-optical device, method of manufacturing the same, and electronic apparatus
Methods of establishing virtual circuits and of providing a virtual private network service through a shared network, and provider edge device for such network
Adding co-users to user definable co-user lists
  Randomly Featured Patents
Packet file system
Durable and efficient equipment for the production of a combustible and non-pollutant gas from underwater arcs and method therefor
Mechanical starter motor
Hand shower
Poinsettia named V-10 Pink
Vacuum cleaner
Printing apparatus and printing method
Multi-clip magazine assembly for rifles
Oral compositions for calculus retardation
Disk holder