A Temperature Compensated CMOS Ring Oscillator for Wireless Sensing Applications
Authors: 
Jamel Nebhen, Stéphane Meillère, Mohamed Masmoudi, Jean-Luc Seguin, Hervé Barthelemy, Khalifa AguirAuthors Info & Claims
Jamel Nebhen, Stéphane Meillère, Mohamed Masmoudi, Jean-Luc Seguin, Hervé Barthelemy, Khalifa AguirAuthors Info & ClaimsPages 47 - 54
Abstract
This paper presents a CMOS voltage controlled ring oscillator (VCO) with temperature compensation circuit suitable for low-cost and low-power MEMS gas sensor. This compensated ring oscillator is dedicated to Chopper Stabilized CMOS Amplifier (CHS-A). 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 1 V. The chip is fabricated in AMS 0.35 μm CMOS process with an area of 0.032 mm2. Operating at 1.25 V, the output frequency is within 200 l0 kHz over the temperature range of 25 C to 80 C with power consumption of 810 μW.
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- A Temperature Compensated CMOS Ring Oscillator for Wireless Sensing Applications
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Copyright © Copyright © 2014 Springer Science+Business Media New York.
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Published: 01 April 2014
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