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
Monitoring activity of a user in locomotion on foot
Method for conductivity control of (Al,In,Ga,B)N
Method of manufacturing pipe with branch
Compositions and methods for activating innate and allergic immunity
Apparatus and methods for providing efficient space-time structures for preambles, pilots and data for multi-input, multi-output communications systems
Light barrier and method for detecting objects
Electric rotating machine for vehicle
  Randomly Featured Patents
Recorder pen
Multiple layer piezoelectric wavefront modulator
Methods, apparatus and computer program products for associating local telephone numbers with emergency phone calls in a packet switched telephone system
Football field grille
Activation control apparatus and method of air bag system
Sealed automotive emblem lighting assembly and method
Long distance multimodal biometric system and method
Induction cooking mat for maintaining temperature in food and drink
Hydraulic device for operating a clutch in an industrial vehicle
System for allocating data output requests to output units having different output formats in accordance with data output format compatibility and priority characteristic