A new scheme for DC offset compensation and its application to current mode and voltage mode D/A converters

A new DC offset compensation technique for voltage buffers is presented. It can used to improve the accuracy of data converters. This technique also compensates the finite gain error of the op-amp and it is fast compared to conventional techniques. As an application of this technique, a 10-bit current mode and a 10-bit voltage mode D/A converter are described. Simulation results in 0.5 mum CMOS technology are provided to validate the design.