Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Hydrothermal synthesis of nanocubes of sillenite type compounds for photovoltaic applications and solar energy conversion of carbon dioxide to fuels
Scanning projection apparatus with tangential compensation
Sampling filter device
Liquid crystal display device
Ventilated vacuum commutation structure
Method for restricting the use of an application program, system for authenticating the user of a measuring apparatus, authentication server, client apparatus and storage medium
Acoustic echo cancellation
  Randomly Featured Patents
Logic circuit programmable to implement at least two logic functions
Gas sensor
Method and system for desktop tagging of a web page
Segmented toroidal core for manufacturing pneumatic tires
Auxiliary power steering mechanism, especially for motor vehicles
Method and apparatus for maintaining an approximate constant current output characteristic in a switched mode power supply
Evaluation method for coefficient of thermal expansion of ultra-low-expansion glass material
Clamping mechanism for securing an EDM electrode holder in a hydraulic chuck
Healthcare tele-robotic system with a robot that also functions as a remote station
Structure for connecting a stablizer bar and lower control arm to each other