CLASS AB OUTPUT STAGE AND METHOD FOR PROVIDING WIDE SUPPLY VOLTAGE RANGE

摘要

A class AB output stage includes first (Mp) and a second (MN) output transistors having sources coupled to first (VDD) and second reference voltages, respectively, drains coupled to an output (13), and gates coupled to first (HA) and second (12A) conductors, respectively. Portions of first (IINI) and a second (IIN2) input currents are sourced via a first input conductor (11) and a second input conductor (12), respectively, into and from sources of first (M2) and second (M4) transistors, respectively. Gates of the first (M2) and second (M4) transistors are coupled to the first and second conductors, respectively. First (Vrefp) and second (VrefP) bias voltages are applied to gates of third (Ml) and fourth (M3) transistors respectively, having sources coupled to the first and second input conductors, respectively, and drains coupled to the second conductor.