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
Image forming apparatus
Optical fixing device and image forming apparatus
Aluminum oxide coated cutting tool and method of manufacturing thereof
Synergistic compositions for the treatment of topical viral infections
Laser processing machine
Methods and compositions for inhibiting progression to chronic cardiac failure
Process for producing a plasma protein-containing medicament with reduced concentration of citrate and metals
  Randomly Featured Patents
Projection lens
Spud bushing system for mobile offshore arctic drilling structure
Tape measure apparatus with a rotating and sliding catch
Indium gallium nitride smoothing structures for III-nitride devices
Acellular antibordetella vaccine
Portable space heater
Color measuring method and device for printed matter
Switch actuator
2-(aminoalkoxy) phenylalkylamines with antiinflammatory activity
High-speed scheduling apparatus for a switching node