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
CMOS image sensor
Compact multi-functional scanning apparatus with retractable flatbed scanner
System and method for oscillator frequency control
Print processing method, print relay server, control method, and storage medium to reserve print data
Boundary acoustic wave device
Image forming apparatus and method for making density correction in a low resolution image based on edge determination
Identification of protected content in e-mail messages
  Randomly Featured Patents
Portable gas fractionalization system
Inductive element having a gap and a fabrication method thereof
Method of conditioning fireside fouling deposits using super large particle size magnesium oxide
Metal collector
Image capturing apparatus and automatic exposure control correcting method
Preparation for the care and conditioning of the feet
Multilayer stent
Gun equipped with a moveable handshield for controlling gun loading
Image sensing apparatus for correcting a defect in color signals generated by a CCD
Circuits and methods for level shifting a signal