Abstract
Circuit techniques for realizing a highly accurate and high-speed CMOS DAC are described. Firstly, we realized the current source matrix with 14-bit resolution adopting a new structure that eliminates the influence of the voltage drop caused by the line resistance. Next, we confirmed that the time-constant change of the output terminal depending on the digital input code deteriorates SFDR, and propose the output circuit that suppresses the time-constant change.
