A High CMRR, High Slew Rate, Low Total Harmonic Distortion CMOS OTA for HF Applications

Author

Mane, Anup ; Yagain, Deepa

Author_Institution

Dept. of Electron. & Commun. (VLSI Design & Embedded Syst.), People´´s Educ. S.oc. Inst. of Technol., Bangalore, India

fYear

2009

fDate

16-18 Dec. 2009

Firstpage

141

Lastpage

148

Abstract

A balanced OTA which is the simplest configuration of an operational transconductance amplifier is chosen as a basic building block for the present work and the performance is verified in terms of CMRR, slew rate and total harmonic distortion (THD). A design procedure has been adopted to improve the circuit behaviour. The resulting OTA has improvement as compared to the basic balanced OTA in terms of better CMRR, slew rate and lower THD. Further, the improved circuit of balanced OTA is used to implement tunable OTA. The tunable OTA designed in the present work has CMRR of 56 dB, slew rate of 1.6 V/ns and total harmonic distortion of 0.6%. The circuits are implemented in 130 nm using TSMC MOSIS Level-49 model in HSPICE simulator and the physical implementation (layouts) has been done in Tanner EDA L-Edit.

Keywords

CMOS analogue integrated circuits; circuit tuning; harmonic distortion; operational amplifiers; CMOS OTA; CMRR; HF applications; HSPICE simulator; TSMC MOSIS Level-49 model; Tanner EDA L-Edit; balanced OTA; circuit behaviour; operational transconductance amplifier; size 130 nm; slew rate; total harmonic distortion; tunable OTA; Circuit simulation; Filters; Hafnium; MOSFETs; Operational amplifiers; Resistors; Total harmonic distortion; Transconductance; Tunable circuits and devices; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Emerging Trends in Engineering and Technology (ICETET), 2009 2nd International Conference on

Conference_Location

Nagpur

Print_ISBN

978-1-4244-5250-7

Electronic_ISBN

978-0-7695-3884-6

Type

conf

DOI

10.1109/ICETET.2009.9

Filename

5395049