Title :
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
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;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1329059
