Current-Steering Digital-to-Analog Converter With a High-PSRR Current Switch

A power-supply noise (PSN) reduction method for a fully differential current-steering digital-to-analog converter is presented. The method employs a proposed auxiliary path in each current switch and makes PSN-induced currents common-mode ones at the positive and negative outputs, resulting in the differential output with PSN suppressed. The proposed switch also has the capability to cancel out glitch. The simulation results show that the influence due to PSN is effectively reduced and the spurious-free dynamic range is improved.