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
Tablet computer
Method and system for monitoring service quality in a mobile node
Method and device for operating a vehicle having a hybrid drive
Method and apparatus for providing seamless call handoff between networks that use dissimilar transmission methods
SONOS stack with split nitride memory layer
Storage device performance alignment notification
Apparatus and method for information processing, program, and recording medium
  Randomly Featured Patents
Electronic device with replaceable plug
Combustion power tool
Method of making an environmental seal
Method of making simulated ceramic tile
Aqueous, hard water-resistant wetting agent and detergent composition, and the preparation and use thereof in textile pretreatment
Process for production of an integrated circuit
7-Oxabicycloheptane substituted oxamide prostaglandin analogs and their use in treating thrombolytic disease
Color image forming apparatus with toner recycling
Power management of storage units in a storage array
Monitoring apparatus