A very high-frequency CMOS complementary folded cascode amplifier

Author

Vallee, Richard E. ; El-Masry, Ezz I.

Author_Institution

Appl. Microelectron. Inst., Halifax, NS, Canada

Volume

29

Issue

2

fYear

1994

fDate

2/1/1994 12:00:00 AM

Firstpage

130

Lastpage

133

Abstract

A wide-band, fast settling CMOS complementary folded cascode (CFC) transconductance amplifier for use in analog VLSI high frequency signal processing applications is introduced. The superior performance of the CFC architecture over that of the folder cascode (FC) or mirrored cascode (MC) approaches for VLSI amplifiers is demonstrated. The symmetrically configured complementary input stage provides a wide common-mode input voltage range. The amplifier performs as an operational transconductance amplifier (OTA) and displays a first-order dominant pole when loaded by a shunt capacitor. The transconductance amplifier is small in area (0.016 mm²), and well suited for high frequency analog signal processing applications. Simulation and experimental results demonstrate a DC gain of approximately 50 dB, with a 0.1% settling response of under 10 ns for loads varied from 0 to 2 pF

Keywords

CMOS integrated circuits; VLSI; analogue processing circuits; linear integrated circuits; operational amplifiers; wideband amplifiers; 0 to 2 pF; 50 dB; CMOS complementary folded cascode amplifier; DC gain; VLSI amplifiers; analog VLSI high frequency signal processing applications; common-mode input voltage range; first-order dominant pole; operational transconductance amplifier; settling response; shunt capacitor; transconductance amplifier; wideband amplifiers; Broadband amplifiers; CMOS process; Capacitors; Displays; Frequency; Operational amplifiers; Signal processing; Transconductance; Very large scale integration; Voltage;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.272117

Filename

272117