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
Methods for enhancing tantalum filament life in hot wire chemical vapor deposition processes
Herbicide composition having improved effectiveness, method of preparation and use
Method and device for determining processed image data about a surround field of a vehicle
Image display device and capsule endoscope system
Apparatus and method for scrolling a screen of a portable terminal having a touch screen
Authenticated secret sharing
Switchgear operating apparatus and three-phase switchgear
  Randomly Featured Patents
Storage case for a camera
Multi-purpose arrow assembly tool
Rolling gate grille
Flower knife
Inflatable spherical vehicular device
Lamp filament
Magnetoresistive device having a tantalum layer connected to a shielding layer via a layer of a body-centered cubic structure
Fluid cushion
DTV transmitting system and method of processing broadcast data
Printhead cartridge with ink supply bags