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
Supporting multiple channels of a single interface
Selective facsimile denial
Method and system for network configuration for virtual machines
Systems and methods for tracking mobile terrestrial terminals for satellite communications
Management of computer-file sharing between at least two devices
Methods and apparatus for imaging in conjunction with radiotherapy
High-efficiency preambles for communications systems over pseudo-stationary communication channels
  Randomly Featured Patents
Holding device
Tandem piezoelectric actuator and single drive circuit for atomic force microscopy
Printed plastic circuits and contacts and method for making same
Infrared thermometer
Using a modified value GPR to enhance lookahead prefetch
Catheter and method for cholangiography
Radiation image recording apparatus
Magnetic head, and device and method for manufacturing the same
Apparatus and methods for enhancing a video display
Method of in situ formation of translumenally deployable heart valve support