Resources Contact Us Home
Delta-sigma modulator and its application to switching amplification circuit

Image Number 15 for United States Patent #7248193.

A loop delay control circuit is provided between a comparator and a power switch stage. When the amplitude of an input signal is especially high, the loop delay control circuit secures an oscillation threshold value by setting a delay amount at a low value. On the other hand, when the amplitude of the input signal is not so high, the loop delay control circuit reduces an average switching rate by increasing the delay amount, but does not reduce the oscillation threshold value. This makes it possible to provide a delta-sigma modulator allowing realization of both (i) a high oscillation threshold value, i.e., high output power, and (ii) high power efficiency.

  Recently Added Patents
Floor standing rack
Video surveillance system employing video primitives
Inductive antenna coupling
Side portion of a circular saw blade
Paging of a user equipment (UE) within a wireless communications system
Stage drive method and stage unit, exposure apparatus, and device manufacturing method
Nanoparticle entrapment of materials
  Randomly Featured Patents
Image processing apparatus, image forming apparatus, and control method thereof, which form an image by applying N-ary processing
Method of simultaneously forming patterns on a die of an alignment mark and other dies
Filling stream adjusting process
Electrostatic-safe, air-powered, miniature vacuum generator
Process for producing carbon-bonded refractory ceramic moldings
Tissue specimen isolating and damaging device and method
Switchable high voltage generator for penetration-type color CRT
Tandem electrode welder and method of welding with two electrodes
Program translating apparatus and a processor which achieve high-speed execution of subroutine branch instructions