Single ended rail-to-rail CMOS OTA based variable-frequency ring-oscillator

Author

Barthélemy, Hervé ; Meillère, Stéphane ; Bourdel, Sylvain

Author_Institution

IMT Technopole de Chateau Gombert, Polytech Marseille, France

Volume

4

fYear

2004

fDate

23-26 May 2004

Abstract

A new current-controlled ring oscillator based on a single-ended rail-to-rail operational transconductance amplifier (OTA) and three simple CMOS inverters is presented in this paper. The tuning frequency of the proposed oscillator is achieved by modifying the OTA DC bias current. Our proposed CMOS oscillator has been simulated under 3.5 V with the 0.8 μm BiCMOS technology from AMS. For a DC bias current between 1 μA to 200 μA, simulation results confirm wide tuning range of 1.2 MHz to 36 MHz. The total circuit area is only 0.05 mm².

Keywords

BiCMOS integrated circuits; CMOS integrated circuits; circuit tuning; integrated circuit modelling; invertors; low-power electronics; operational amplifiers; voltage-controlled oscillators; 0.8 micron; 1 to 200 muA; 1.2 to 36 MHz; 3.5 V; BiCMOS technology; CMOS OTA based variable-frequency ring-oscillator; CMOS inverters; CMOS oscillator; DC bias current; current-controlled ring oscillator; simulation; single-ended rail-to-rail operational transconductance amplifier; tuning frequency; BiCMOS integrated circuits; Circuit simulation; Frequency; Inverters; Operational amplifiers; Rail to rail amplifiers; Rail to rail operation; Ring oscillators; Transconductance; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on

Print_ISBN

0-7803-8251-X

Type

conf

DOI

10.1109/ISCAS.2004.1329059

Filename

1329059