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
System for determining potential lot consolidation during manufacturing
Digital signal processing apparatus, liquid crystal display apparatus, digital signal processing method and computer program
Automated hotfix handling model
Taste receptors of the T1R family from domestic cat
Clock generator circuit for a charge pump
System for encrypting and decrypting a plaintext message with authentication
Computerized information and display methods
  Randomly Featured Patents
Integral catheter and blood tester
Portable radiotelephone
Method for reducing the strength of ice
Optical cross-connect used in an optical network and method performed by the same
Navigation method and system to provide a navigation interface
Method for drying low rank coals
Method and apparatus for controlling set-top box hardware and software functions
Antenna coupling network with element pattern shift
Electronic device
Alignment control device