Patent ID: 6075473
Filing Date: 2000-06-13
Classification: H03K,H03M

Abstract:
A digital-to-analog converter comprising:2.sup.N constant electric current sources with equal constant electric current values;driving signal generating means for generating driving signals switched at a first interval period;2.sup.N switching means driven by the driving signals, wherein each switching means includes a pair of differential switching elements connected to each of the 2.sup.N constant electric current sources respectively;de-glitching signal generating means for generating a positive de-glitching signal and a negative de-glitching signal switched at a second interval period shorter than a predetermined interval period;positive de-glitching means including a pair of differential switching elements each connected on one end to one member of the pair of differential switching elements of the 2.sup.N switching means and driven by the positive de-glitching signal where the other end of one of the differential switching elements of the positive de-glitching means connects to an output terminal;negative de-glitching means including a pair of differential switching elements each connected on one end to an other member of the pair of differential switching elements of the 2.sup.N switching means and driven by the negative de-glitching signal where the other end of one of the differential switching elements of the negative de-glitching means connects to an output terminal; andadding means for adding output signals from the other differential switching element of the positive de-glitching means and the other differential switching element of the negative de-glitching means;wherein the de-glitching signal generating means generates the de-glitching signal in order to avoid providing output current during the switching of the driving signals.