Title :
A complementary bipolar operational amplifier with feed-forward compensation
Author :
Koullias, I.A. ; Riemer, D.W.
Author_Institution :
AT&T Bell Lab., Reading, PA, USA
Abstract :
An operational amplifier that employs a feed-forward architecture to achieve a 50-MHz unity-gain bandwidth and 130-dB open-loop gain is described. The amplifier response is dominated at low frequencies by a precision two-stage amplifier, whereas at high frequencies a single folded-cascode stage takes over and reduces the overall phase shift. The 1.84-mm×2.4-mm chip was fabricated by a dielectrically isolated 400-MHz complementary bipolar process
Keywords :
bipolar integrated circuits; compensation; linear integrated circuits; operational amplifiers; wideband amplifiers; 130 dB; 400 MHz; 50 MHz; amplifier response; complementary bipolar operational amplifier; dielectrically isolated process; feed-forward compensation; monolithic op amp; precision two-stage amplifier; single folded-cascode stage; Broadband amplifiers; Capacitors; Circuit synthesis; Feedforward systems; Frequency; Impedance; Operational amplifiers; Transconductance; Transfer functions; Voltage;
Conference_Titel :
Bipolar Circuits and Technology Meeting, 1989., Proceedings of the 1989
Conference_Location :
Minneapolis, MN
DOI :
10.1109/BIPOL.1989.69470
