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
Multiple RF band operation in mobile devices
Manufactured product configuration
Method of optimizing air mover performance characteristics to minimize temperature variations in a computing system enclosure
Channel estimating method and device
Transmission channel for ultrasound applications
Location estimation of wireless terminals through pattern matching of deduced signal strengths
Leg mounted portable computer
  Randomly Featured Patents
Scroll compressor with three-step capacity control
Measuring instrument for body and subcutaneous fat thickness
Methods for and products having self-aligned conductive pillars on interconnects
Ablation of blood thrombi by means of acoustic energy
Call system for location and training of a cat or other domestic animal
Method of producing a high vacuum in a container
Graphics generator
Differential thermal heating in microwave oven packages
Connecting rod with a shank composed of fiber composite material
Animal tote