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
Movable assemblies for an image reader unit and a cover unit in an image formation apparatus
Lens barrel and imaging device
Image descriptor quantization
Verification of computer-executable code generated from a model
Transfer of digital data through an isolation
Polarization-coupled ferroelectric unipolar junction memory and energy storage device
  Randomly Featured Patents
Process for sputtering multilayers for magneto-optical recording
Portable computer having locking apparatus
Reporting dial up access problems using a real-time automated system
Computerized system for conducting medical studies
Bottom hole assembly
Coil conductor with trace conductors for a thin-film magnetic head
Methods and systems for fault location
Mop head securement device
Dermopharmaceutically and cosmetically active oligopeptides