A BiCMOS wideband operational amplifier with 900 MHz gain-bandwidth and 90 dB DC gain

Author

Ehsanian, Mehdi ; Kaminska, Bozena

Author_Institution

Ecole Polytech., Montreal Univ., Que., Canada

Volume

1

fYear

1996

fDate

12-15 May 1996

Firstpage

171

Abstract

A fully differential operational amplifier has been designed and fabricated for analog-to-digital converter application. The amplifier mainly consists of folded cascode structure with current source as output loads and common-mode feedback circuits. The technique of feed-forward compensation is used in order to improve the settling time and gain bandwidth (GBW) of this amplifier. This amplifier is integrated in 0.8 μm BiCMOS process with an active die area of 0.1 mm². The DC gain of this amplifier is 90 dB. The GBW and phase margin of this amplifier is 900 MHz and 47°, respectively. The power dissipation is minimized by using BiCMOS technology and is about 25 mW for 2 pF load capacitance

Keywords

BiCMOS analogue integrated circuits; analogue-digital conversion; compensation; differential amplifiers; feedback amplifiers; feedforward; operational amplifiers; 0.8 micron; 2 pF; 25 mW; 90 dB; 900 MHz; ADC application; BiCMOS process; analog/digital converter application; common-mode feedback circuits; current source as output load; feedforward compensation; folded cascode structure; fully differential opamp; gain bandwidth; settling time; wideband operational amplifier; Analog-digital conversion; Bandwidth; BiCMOS integrated circuits; Broadband amplifiers; Capacitance; Differential amplifiers; Feedback circuits; Feedforward systems; Operational amplifiers; Power dissipation;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISCAS.1996.539836

Filename

539836