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
Illuminating device
Vacuum cleaner filter adapter ring
Coupling device having piercing member
Light emitting device
Native NAD-dependent GAPDH replaced with NADP-dependent GAPDH plus NADK
Radio communication devices, information providers, methods for controlling a radio communication device and methods for controlling an information provider
Train car for proppant containers
  Randomly Featured Patents
Rotational angle detecting devices
Substrates and inhibitors of proteolytic enzymes
Numerical control apparatus
Solution spinning of UHMW poly (alpha-olefin) with recovery and recycling of volatile spinning solvent
Use of YNES, essential bacterial genes and polypeptides
Device for providing rugs and the like with tufts
Optical pickup device
Automatic slack adjuster for vehicle brakes
Structure and method for forming the gate electrode in a multiple-gate transistor
Oxide semiconductors and thin film transistors comprising the same