Cascaded third-order tunable low-pass filter using low voltage low power OTA

Author

Ismail, Sondos H. ; Soliman, Eman A. ; Mahmoud, Soliman A.

Author_Institution

Electr. & Electron., Eng. Dept., German Univ. in Cairo, Cairo, Egypt

fYear

2011

fDate

12-14 Dec. 2011

Firstpage

488

Lastpage

491

Abstract

A low voltage low power tunable Operational Trans-conductance Amplifier (OTA) is presented in this paper. The OTA is tuned via a control voltage. The OTA power consumption is 0.15mW at 1V supply voltage. A digitally controlled Master/Slave tuning scheme is applied to generate the OTA control voltage. The trans-conductance gain of the OTA is varied from 9.3μA/V to 35.29μA/V. The proposed OTA is used to realize a cascaded third-order low-pass filter. The filter cutoff frequency is tuned from 4.75MHz to 12.79MHz. The circuit is realized using 90nm CMOS technology model from MOSIS under 1V single ended supply. Simulations using ADS are presented.

Keywords

CMOS analogue integrated circuits; circuit tuning; low-pass filters; low-power electronics; operational amplifiers; ADS simulation; CMOS technology model; MOSIS; OTA control voltage; cascaded third-order tunable low-pass filter; digitally controlled master-slave tuning scheme; filter cutoff frequency; frequency 4.75 MHz to 12.79 MHz; low voltage low power OTA; low voltage low power tunable operational transconductance amplifier; power 0.15 mW; size 90 nm; voltage 1 V; CMOS integrated circuits; Cutoff frequency; Low pass filters; Phase locked loops; Tuning; Voltage control; Voltage-controlled oscillators; Master/Slave Tuning Scheme; OTA-C low-pass filter; Operational Trans-conductance Amplifier (OTA); Phase-Locked Loop (PLL); Voltage Controlled Oscillator (VCO);

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Circuits (ISIC), 2011 13th International Symposium on

Conference_Location

Singapore

Print_ISBN

978-1-61284-863-1

Type

conf

DOI

10.1109/ISICir.2011.6132003

Filename

6132003