Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Power amplifier with controlled output power










Image Number 2 for United States Patent #7560989.

The invention includes a power amplifier with an amplifier core including parallel amplifier cells, a replica cell made of one amplifier cell similar to those of the amplifier core, a power controller to select a combination of amplifier cells to activate, a regulator to fix the top voltage of the replica cell to a reference voltage, a voltage generator to provide the voltage reference to the regulator, a current generator to provide a reference current through the replica cell, and a drive unit controlled by the regulator output to drive the combination of amplifier cells, so that each selected combination of activated cells defines a predetermined attenuation level of power amplifier output signal so that it is attenuated in a stepwise manner.








 
 
  Recently Added Patents
Reception method and reception apparatus
Cryptographically generated addresses using backward key chain for secure route optimization in mobile internet protocol
Level-shift circuit, electro-optical device, and level shift method
Using storage cells to perform computation
High-voltage AC light-emitting diode structure
Preserving user applied markings made to a hardcopy original document
Off-line converter with digital control
  Randomly Featured Patents
Method for downloading an icon corresponding to a hierarchical directory structure from a directory service
Double Impatiens plant named `Didi Orange Two`
Ink jet recording apparatus
Signal conversion apparatus and display apparatus using the same
Ultrafast digital photonic signal processing using optical noncollinear second harmonic generation
Method and apparatus for making wide mouth hollow glass articles
Polyacrylic hot melt adhesives
Mill box for materials grinder
Sealable nozzle adaptor for use with a caulking tube cartridge
Systems and methods for storing and searching data in a customer center environment