Patents Assigned to Data Conversion Systems Limited
  • Digital to analogue converter adapted to select input sources based on a preselected algorithm once per cycle of a sampling signal
    Patent number: 5138317
    Abstract: An n-bit DAC of the kind having at least 2.sup.n -1 sources, typically current sources, especially for use in oversampling ADC's enables a resolution accuracy in excess of 18 bits by selecting the sources in a dynamic manner. A source selection circuit typically an at least 2.sup.n -1 to 2.sup.n -1 multiplexer, connected between the digital input lines and the DAC switches selects the sources based on a predetermined cyclic algorithm which converts DAC errors into noise and shifts the noise energy into unwanted parts of the spectrum.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: August 11, 1992
    Assignee: Data Conversion Systems Limited
    Inventor: Michael J. Story