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
Method of optimizing air mover performance characteristics to minimize temperature variations in a computing system enclosure
Method for producing male sterile plants using plant beclin 1/ATG6 expression
Adaptive flow for thermal cooling of devices
Control strategies for a multi-mode drive system
Method and structure for forming ETSOI capacitors, diodes, resistors and back gate contacts
Organic electroluminescence device
Multilayered material sheet and process for its preparation
  Randomly Featured Patents
Current comparator circuit
Engine controller for a vehicle including an automatic centrifugal clutch
Precast, prestressed concrete truss
Housing for a two-way communication device
Apparatus for producing cable elements incorporating otpical fibers
Thermistor actuated device for controlling the drive of a power window
Encapsulated glass assembly
Method and apparatus for accelerating a particle beam
Random 1-butene/ethylene copolymer
Syringe with selectable indicia of contents