Title :
A fast-settling op amp with low supply current
Author :
Widlar, Robert J. ; Yamatake, Mineo
fDate :
6/1/1989 12:00:00 AM
Abstract :
A dual-operational amplifier that will settle to 0.01% in 400 ns with a 10-V output step is discussed. Quiescent operating current is 3 mA per amplifier. A low-cost, 40-V, bipolar process with junction isolation and complementary transistors having fT~150 MHz is used. The design obtains inherent DC accuracy by using an undergenerated bipolar input stage operated with 20-μA collector currents
Keywords :
bipolar integrated circuits; operational amplifiers; 20 muA; 40 V; 400 ns; collector currents; complementary transistors; dual-operational amplifier; fast-settling op amp; junction isolation; output step; quiescent operating current; supply current; undergenerated bipolar input stage; Bandwidth; Bipolar transistors; Capacitance; Current supplies; Dynamic range; FETs; Low voltage; Noise generators; Operational amplifiers; Transconductance;
Journal_Title :
Solid-State Circuits, IEEE Journal of
