Title :
A 3-V CMOS low-distortion class AB line driver suitable for HDSL applications
Author :
Kappes, Michael S.
Author_Institution :
Conexant Syst. Inc., San Diego, CA, USA
fDate :
3/1/2000 12:00:00 AM
Abstract :
A fully differential CMOS line driver for use in high bit-rate digital subscriber line (HDSL) services Is presented. The circuit is fabricated in a single-poly quad metal 0.35-/spl mu/m process and achieves <-70-dB total harmonic distortion while driving up to /spl plusmn/2.4-V, 200-kHz signals into 30 /spl Omega/ with a 3-V supply. The circuit features a closed loop gain of 6.0 with minimal input capacitance (<200 fF). The circuit requires less than 20 mA of quiescent current and is capable of delivering dynamic currents as large as 180 mA. The circuit is a multistage amplifier utilizing nested-Miller compensation and an enhanced class AB output stage.
Keywords :
CMOS analogue integrated circuits; capacitance; compensation; differential amplifiers; digital subscriber lines; driver circuits; harmonic distortion; integrated circuit design; 0.35 micron; 180 mA; 3 V; HDSL applications; closed loop gain; dynamic currents; enhanced class AB output stage; fully differential CMOS line driver; input capacitance; low-distortion class AB line driver; multistage amplifier; nested-Miller compensation; quiescent current; single-poly quad metal process; total harmonic distortion; Bandwidth; DSL; Driver circuits; Linearity; Nonlinear distortion; Operational amplifiers; Signal design; Telecommunication standards; Transceivers; Transmitters;
Journal_Title :
Solid-State Circuits, IEEE Journal of
