A New Low-Voltage, Low-Power and High-Slew Rate CMOS Unity-Gain Buffer

Class-AB circuits, which are capable of dealing with currents several orders of magnitude larger than their quiescent current, are good candidates for low-power and high slew-rate analog design. This paper presents a novel topology of a class AB Flipped Voltage Follower (FVF) that has better slew rate and the same power consumption as the conventional class-AB FVF buffer previously presented in literature. It is thus suitable for low-voltage and low-power stages requiring low bias currents. These buffers have been simulated using 0.5 ?m CMOS Technology models provided by IBM. The buffer consumes 16 ?A from a 0.9 V supply and has a bandwidth of 52 MHz with an 18 pF load. It has a slew rate of 10.3 V/?s and power consumption of 36 ?w.