Design of a novel linear 3-input CMOS OTA and its application to filter realization

Author

Jeong, MoonJae ; Takagi, Shigetaka ; Czarnul, Zdzislaw ; Fujii, Nobuo

Author_Institution

Dept. of Phys. Electron., Tokyo Inst. of Technol., Japan

fYear

1996

fDate

18-21 Nov 1996

Firstpage

121

Lastpage

124

Abstract

A novel voltage-tunable linear 3-input CMOS Operational Transconductance Amplifier (OTA) suitable for on-chip integration of advanced monolithic system is described. When a 3-input OTA is needed, a conventional 3-input OTA uses two 2-input OTAs and grounds one of 4 input terminals. This paper presents a method to reduce the number of MOS transistors and to save chip area by designing a 3-input OTA directly. A CMOS pair technique is introduced as a solution to minimize a matching problem. Simulation results show that the active chip area of the proposed 3-input OTA is reduced by 23.7% compared to a conventional one. The proposed 3-input OTA is applied to a realization of an OTA-C filter to verify the effectiveness

Keywords

CMOS analogue integrated circuits; active filters; operational amplifiers; CMOS pair technique; MOS transistor count; OTA-C filter; active chip area; linear three-input CMOS OTA; matching problem minimization; monolithic system; on-chip integration; voltage-tunable operational transconductance amplifier; CMOS technology; Circuits; Electronic mail; Logic devices; MOSFETs; Moon; Nonlinear filters; Operational amplifiers; Transconductors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1996., IEEE Asia Pacific Conference on

Conference_Location

Seoul

Print_ISBN

0-7803-3702-6

Type

conf

DOI

10.1109/APCAS.1996.569234

Filename

569234