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
Binder for secondary battery providing excellent adhesion strength and cycle property
Method and mobile device for awareness of language ability
Method for specifying control curve parameters for controlling climatic environmental conditions of climate-controlled enclosed spaces
Lubricant supplying device, process cartridge, and image forming apparatus
Methods and apparatus for imaging in conjunction with radiotherapy
Adaptive known signal canceller
Method and system for a low-power client in a wide area network
  Randomly Featured Patents
Intraocular pressure sensor
Compensating for variations in article speeds and characteristics at different article positions during article irradiation
Waste-oil cleaning apparatus
System and method for controlling engine idle speed of internal combustion engine
Dispensing canister
Route search device and route search method
Cleaning compositions
Standing pipe faucet assembly
Providing instrumentation data to an instrumentation data source from within a managed code