Novel low-voltage CMOS biquads

Author

Zhang, Xuguang ; El-Masry, Ezz I.

Author_Institution

Dept. of Electr. & Comput. Eng., Dalhousie Univ., Halifax, NS, Canada

Volume

1

fYear

2000

fDate

2000

Firstpage

407

Abstract

Novel low-voltage CMOS biquads that operate in voltage-mode and current-mode are presented. They are implemented using single-output or triple-output operational transconductance amplifiers (OTAs) and capacitors. The new CMOS realization of the OTA is based on the cross-coupled configuration and is biased by the common-mode voltage. With only two transistors stacked between the supply rail and ground, the proposed OTA is well suitable for low-voltage applications. Simulation results show that the biquads realized by the proposed OTA have the advantages of low-voltage operation, simple circuitry, multiple filtering functions and electronic tunability (ω₀ and Q)

Keywords

CMOS integrated circuits; biquadratic filters; circuit tuning; low-power electronics; operational amplifiers; MOSFET; capacitors; common-mode voltage bias; cross-coupled configuration; current-mode operation; electronic tunability; ground; low-voltage CMOS biquads; low-voltage operation; multiple filtering functions; operational transconductance amplifiers; simulation results; single-output OTA; supply rail; transistors; triple-output OTA; voltage-mode operation; Capacitors; Circuits; Filtering; Filters; MOSFETs; Operational amplifiers; Rails; Signal processing; Transconductance; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2000 Canadian Conference on

Conference_Location

Halifax, NS

ISSN

0840-7789

Print_ISBN

0-7803-5957-7

Type

conf

DOI

10.1109/CCECE.2000.849740

Filename

849740