Resources Contact Us Home
Efficient power amplifier

Image Number 18 for United States Patent #7834702.

A dynamic power supply for N amplifiers includes first and second power boost circuits which temporarily boost the positive or negative power supply rail, respectively. A control circuit monitors amplifier output signal levels and provides power boost control signals to the power boost circuits, which temporarily raise the positive supply voltage above the nominal voltage level in tandem with the highest output signal from the N amplifiers and lower the negative supply voltage below the nominal voltage level in tandem with the lowest output signal level from the N amplifiers. The power boost circuits each may be coupled to a reservoir capacitor from which current is drawn to provide the power boost. When inactive, the reservoir capacitors charge up from the respective power supply rails. The dynamic power supply is well suited for audio amplification systems.

  Recently Added Patents
Mixer cell, modulator and method
Electric toothbrush
Dynamic frequency band allocation between radio communication networks
Optical transmission system and optical transmission method
Displaying comment data corresponding to a video presentation
Diffractive optical element, distance measuring apparatus and distance measuring method
Bean variety RS 08071160
  Randomly Featured Patents
Localized use of nitric oxide-adducts to prevent internal tissue damage
Electromagnetic control device for tape recorder
Method for depositing electrically conducting polymer films via electrochemical deposition of precursor polymers
Table-type game apparatus
Machine for drilling holes in right-angular work surfaces
Using network access port linkages for data structure update decisions
Fin-type field effect transistor
LAN connector having a stopper portion selectively stopping the insertion of a modem cable connector
Input/output core design and method of manufacture therefor