A compact power-efficient 3 V CMOS rail-to-rail input/output operational amplifier for VLSI cell libraries. - Ron Hogervorst; John P. Tero; Ruud G. H. Eschauzier; Johan H. Huijsing (IEEE J. Solid State Circuits, 1994)

A Programmable 3-V CMOS Rail-to-Rail Op Amp with Gain Boosting for Driving Heavy Resistive Loads. - Ron Hogervorst; S. Morteza Safai; John P. Tero; Johan H. Huijsing (ISCAS, 1995)

Compact CMOS constant-gm rail-to-rail input stage with gm-control by an electronic zener diode. - Ron Hogervorst; John P. Tero; Johan H. Hoijising (IEEE J. Solid State Circuits, 1996)