A Multiplying Digital-to-Analog Convertor (MDAC) by Charge-Domain Operation

Abstract

A multiplication type D/A convertor based on the new principles of charge-domain operations is proposed. The D/A convertor has a linear structure of overlapping gates. The design was fabricated by a standard 1.5 um CMOS process. Evaluation results of the two types of D/A conversion experiment are presented. By simple charge accumulation a relatively high, more than 11-bit, resolution is observed. For a successive charge splitting type D/A conversion, although our current evaluation results only show 5-bit resolution, we found possible clues for future improvements.