Title :
A temperature compensated CMOS ring oscillator for wireless sensing applications
Author :
Nebhen, Jamel ; Meillère, Stéphane ; Masmoudi, Mohamed ; Seguin, Jean-Luc ; Barthelemy, Hervé ; Aguir, Khalifa
Author_Institution :
IM2NP, Aix-Marseille Univ., Marseille, France
Abstract :
This paper presents a CMOS voltage controlled ring oscillator (VCO) with temperature compensation circuit suitable for low-cost and low-power wireless sensing applications. To operate at low frequency, a control voltage generated by a CMOS bandgap reference (BGR) is described and the measurement results of the fabricated chips are presented. The output voltage of the reference is set by resistive subdivision. In order to achieve small area and low power consumption, n-well resistors are used. This design features a reference voltage of 1V. The chip is fabricated in AMS 0.35 μm CMOS process with an area of 0.032mm2. Operating at 1.25V, the output frequency is within 200±l0kHz over the temperature range of -25°C to 80°C with power consumption of 810μW.
Keywords :
CMOS integrated circuits; compensation; low-power electronics; resistors; temperature; voltage-controlled oscillators; BGR; CMOS bandgap reference; CMOS process; CMOS voltage controlled ring oscillator; VCO; control voltage; fabricated chip; low-cost wireless sensing application; low-power wireless sensing application; n-well resistor; output voltage; power 810 muW; power consumption; resistive subdivision; size 0.35 mum; temperature -25 C to 80 C; temperature compensated CMOS ring oscillator; temperature compensation circuit; voltage 1 V; voltage 1.25 V; CMOS integrated circuits; Photonic band gap; Resistors; Temperature measurement; Temperature sensors; Voltage-controlled oscillators; CMOS; Voltage-controlled oscillator; bandgap; low-power; temperature compensation;
Conference_Titel :
New Circuits and Systems Conference (NEWCAS), 2012 IEEE 10th International
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4673-0857-1
Electronic_ISBN :
978-1-4673-0858-8
DOI :
10.1109/NEWCAS.2012.6328950
