A rail-to-rail CMOS voltage follower under low power supply voltage
Voltage follower is one of the most useful building blocks in analog circuits. This paper proposes a voltage follower composed of a complementary pair of p-channel MOS(PMOS) and n-channel MOS (NMOS) differential amplifiers which operates under low power supply. The proposed circuit has a rail-to-rail dynamic range by combining complementary differential amplifiers.
cmos voltage follower low power supply ab push-pull rail-to-rail operation