Title :
Improving the high-frequency response of the folded-cascode amplifiers
Author :
Silva-Martinez, Jose ; Carreto-Castro, Flora
Author_Institution :
Nat. Inst. of Astrophys. Opt. & Electron., Puebla, Mexico
Abstract :
In this paper, a technique that improves the phase response of the folded cascode Operational Transconductance Amplifiers (OTAs) is presented. It is shown that with two extra connections the effects of the high frequency poles are minimized and the parasitic oscillations, due to limited phase margin, are further reduced. Therefore, without additional components, the phase margin of the classical folded cascode OTA is improved and the capacitive loaded amplifier settles faster
Keywords :
CMOS analogue integrated circuits; differential amplifiers; frequency response; operational amplifiers; poles and zeros; cascode OTA; folded-cascode amplifiers; high frequency poles; high-frequency response; operational transconductance amplifiers; parasitic oscillations reduction; phase response; CMOS technology; Capacitors; Degradation; Frequency; Optical amplifiers; Poles and zeros; Semiconductor optical amplifiers; Transconductance; Transistors; VHF circuits;
Conference_Titel :
Circuits and Systems, 1996. ISCAS '96., Connecting the World., 1996 IEEE International Symposium on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3073-0
DOI :
10.1109/ISCAS.1996.539994
