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
Method and apparatus for determining storage capacity error for a data storage device
Data output apparatus and data output method
Cardiac function management integrating cardiac contractility modulation
Method and system for coordinating client and host security modules
Apparatus and method for transmitting/receiving data in a communication system
Illuminating waveguide fabrication method
Markers of acute myeloid leukemia stem cells
  Randomly Featured Patents
Image processing method for superposing plural dots on a recording medium at a predetermined interval and apparatus utilizing same
Propellor puller device
Switching power supply using an input DC power supply
Temperature detector
Temperature control arrangement for heat roller
Computer-implement method and system for conducting auctions on the internet
Voltage limiting batteryless transponder circuit
Squeegee assembly for floor cleaning machine
Intervertebral implant with joint parts mounted on roller bodies
Reflective light multiplexing device