Low-voltage class AB switched-current technique

A low-voltage class AB technique for high-speed and medium-resolution switc hed-current (SI) signal processing is described. The technique essentially uses the basic class AB SI memory with error-neutralisation and dummy switc h schemes to reduce output conductance and charge-injection errors. Simulat ed results of thr balanced class AB memory and bilinear integrator operatin g at 100MHz sampling frequency and 1.6V supply indicates that precision bet ter than 8 bits is entirely feasible over the extreme process and temperatu re corners.