Resources Contact Us Home
Current-mode sigma-delta digital-to-analog converter

Image Number 9 for United States Patent #7956782.

In general, this disclosure is directed to a differential current-mode sigma-delta digital-to-analog converter (SD DAC) with improved accuracy and reduced offset and gain errors. In one example, the SD DAC may include a current source configured to provide a differential current. The SD DAC may further include a switching network configured to adjust a polarity of the differential current according to a bit within the bit-stream to produce a differential current signal. The SD DAC may further include a current-to-voltage converter configured to convert the differential current signal to a differential voltage signal. In additional examples, the differential current source may include one or more source degeneration resistances. In further examples, the current-to-voltage converter may include a fully-differential operational amplifier. A low pass filter may be included within the current-to-voltage converter and/or coupled to the output of the current-to-voltage converter.

  Recently Added Patents
Sterilizable film for aseptic packaging
Vibration power generator and vibration power generation device, and communication device and electronic equipment with vibration power generation device
Polyolefin and composition for pipe systems and sheets
Sublingual coated tablet of fentanyl
Medicament delivery device and a method of medicament delivery
Method and apparatus for editing a program on an optical disc
Circuit arrangement having a load transistor and a voltage limiting circuit and method for driving a load transistor
  Randomly Featured Patents
Vehicle with automatic clutch
Semiconductor memory device with clock generating circuit
Optical sensor constituting a light transmissive medium with luminescent particles
Apparatus for regulating and cleaning an air passage in the wall of a furnace
Method for forming a non-symmetrical optical fiber
Substituted carbamate intermediate
Method and device for stacking sheet material
Secondary retainer for a downhole hammer bit
Seat belt device in an automotive seat
Cigarette smoking device with concealed cigarette holder or similar device