A Low-Power and High Slew-rate CMOS Voltage Follower

A scheme of low-power and high slew-rate voltage follower for CSTN-LCD Applications was presented in the paper. Auxiliary modules circuit was adopted in order to meet the demands of low-power and high slew-rate simultaneously. Moreover, cascode frequency compensation was used to obtain better frequency response properties and improve the PSRR+/- of the circuit. In addition, floating current source providing bias current for output stage was introduced to realize a compact circuit structure. Simulation analysis and tape-out verification indicate that static power cost of the whole circuit is 35uA in typical corner. And the time of charge/discharge on the pixel-load is less than 15us.