Patent ID: 6563444
Filing Date: 2003-05-13
Classification: H03M

Abstract:
A digital-to-analog converter comprising:a single-pulse generator, wherein said single-pulse generator periodically issues single pulses; a bit counter, coupled to said single-pulse generator, wherein said bit counter increments a stored count in response to single pulses received from said single-pulse generator; a bit shifter, coupled to said bit counter, wherein said bit shifter contains a plurality of shift registers shifting their respective contents based on the stored count received from said bit counter; a dump control register module, coupled to said bit shifter, containing a plurality of dump control registers; a calibration control register module, coupled to said bit shifter, containing a plurality of calibration control registers; and a current cell array receiving control signals from said dump control register module and said calibration control register module, wherein individual dump control and calibration control registers cooperate together to place individual ones of a plurality of current cells of said current cell array in a redundant calibration mode during a conversion operation of the digital-to-analog converter.