A linear tunable wide input range CMOS OTA

Author

Duangmalai, Danupat ; Kaewdang, Khanittha

Author_Institution

Fac. of Eng., UbonRatchathani Univ., UbonRatchathani, Thailand

fYear

2014

fDate

22-25 Oct. 2014

Firstpage

1

Lastpage

4

Abstract

A new technique to realize the linear tunable and wide input range CMOS OTA is proposed. The realization method is achieved by squaring the long tail current (IB) of the differential pair and improved the linear input range by source degeneration technique. The OTA transconductance gain can be linearly tuned from 10nA to 1mA and the linear input-voltage range of about 1Vp with less than 3% nonlinearity is obtained. The performance of the circuit is discussed and confirmed through PSPICE-simulation results in TSMC 0.35 μm CMOS technology with power supply of ±1.5 V.

Keywords

CMOS analogue integrated circuits; SPICE; differential amplifiers; operational amplifiers; OTA transconductance gain; PSPICE-simulation; TSMC; circuit performance; current 10 nA to 1 mA; differential pair; linear input-voltage range; linear tunable wide input range CMOS OTA; long tail current; power supply; size 0.35 mum; source degeneration technique; Decision support systems; current squarer; current tunable; linear CMOS OTA; transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2014 - 2014 IEEE Region 10 Conference

Conference_Location

Bangkok

ISSN

2159-3442

Print_ISBN

978-1-4799-4076-9

Type

conf

DOI

10.1109/TENCON.2014.7022421

Filename

7022421