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
Aircraft drive
Data output apparatus and data output method
Carbon nanotube fiber spun from wetted ribbon
Train car for proppant containers
Detection system and method for mobile device application
Dental plier
Prompt gap varying optical filter, analytical instrument, optical device, and characteristic measurement method
  Randomly Featured Patents
Method for producing a lactone
Method for forming a thin film transistor
Zinc secondary battery having bipolar plate construction with horizontally disposed battery components
Individual identification recognition system
Device for actuating a gas exchange valve
Information means with waterproof and transmitting light characteristic
Chair control
Circuit and method for adjusting an offset output current for an input current amplifier
Electrical connector
Fluoropolymer coated films useful for photovoltaic modules