Resources Contact Us Home
Efficient power amplifier

Image Number 13 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
Dynamic reconstruction of a calibration state of an absorption spectrometer
Method and apparatus for image sensor packaging
Processing circuitry for use with a position sensor
Print system
Method of inspecting wafer
Electric washing machine
Prompt gap varying optical filter, analytical instrument, optical device, and characteristic measurement method
  Randomly Featured Patents
Method and system for administering devices with multiple user metric spaces
Water removal downstream of a turbine
Fluid deliver system
System for determining the position of sound sources
Control panel for a laundry appliance
Method and apparatus for improving the accuracy of laser range finding
Manual and camera-based avatar control
Movable connector
Rotary electric machine and electric vehicle using the same
Adjusting device in a motor vehicle