A sequential triggering technique in cascaded current source for low power 12‐b D/A converter

Abstract

PurposeThe purpose of this paper is to introduce a low power digital‐to‐analog converter (DAC) by using a sequential triggering technique in cascaded current source.Design/methodology/approachThe block of current cell consists of current switch and source. A sequential switching on process is implemented with the current triggering technique in source. An experiment of 12‐b 150‐MS/s DAC has been integrated in a single‐poly four‐metal 0.35 μm CMOS process.FindingsCompared with conventional cell array in 12‐b 150‐MS/s DAC, the proposed cell array shows that more than 30 percent of power consumption is reduced in full digital bit operation with allowable linearity error of 0.4 LSB.Originality/valueThis paper presents a new operation method of cell array in a current‐steering digital‐to‐analog converter (DAC) to reduce the power consumption significantly.