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
Notebook computer
Treatment of influenza
Managing imaging of computing devices
Community profiling for social media
Case for camera
Optical scanner and image-forming device
  Randomly Featured Patents
Secure short message service (SMS) communications
Runout measurement for devices having a rotating body
Popping fishing lure
Electric machine excited by permanent magnets
Methods and apparatus for improved mosfet drain extension activation
Support for additional dish in a microwave oven
Ink cartridge
Cleaning device, process cartridge, and image forming apparatus that include a blade that is pressed against a surface of a rotating member at a surface pressure of 2.0 MPa or more
Methods and apparatus for decoding multiple independent audio streams using a single audio decoder
Coordinate input device