A Highly Linear CMOS Buffer Amplifier

This paper presents a CMOS buffer amplifier which achieves significant improvements in linearity and drive capability over previously reported "high swing" amplifiers /1-4/. The buffer operates from a 5 volt supply, is capable of rail to rail operation at both the input and output, and exhibits a remarkably high linearity of ·05% THD while driving 3 volts p-p into 100 ohms at 20 kHz.

[1]  K. E. Brehmer,et al.  Large swing CMOS power amplifier , 1983 .

[2]  A. de la Plaza,et al.  Power-supply rejection in differential switched-capacitor filters , 1984 .

[3]  P.R. Gray,et al.  A programmable CMOS dual channel interface processor for telecommunications applications , 1984, IEEE Journal of Solid-State Circuits.

[4]  J.A. Fisher.  A high-performance CMOS power amplifier , 1985, IEEE Journal of Solid-State Circuits.

[5]  R.F. Wassenaar,et al.  Realization of Linear High-Frequency Transconductance in CMOS-Technology , 1986, ESSCIRC '86: Twelfth European Solid-State Circuits Conference.