Title :
Low noise micro-power chopper amplifier for MEMS gas sensor
Author :
Nebhen, Jamel ; Meillère, Stéphane ; Masmoudi, Mohamed ; Seguin, Jean-Luc ; Barthelemy, Hervé ; Aguir, Khalifa
Author_Institution :
IM2NP, Aix-Marseille Univ., Marseille, France
Abstract :
In this paper, a low-noise, low-power and low voltage Chopper Stabilized CMOS Amplifier (CHS-A) is presented and simulated using transistor model parameters of the AMS 0.35 μm CMOS process. This CHS-A is dedicated to high resistive gas sensor detection. The proposed CHS-A using Chopper Stabilization technique (CHS) exhibits an equivalent input referred noise of only 0.194 nV/√(Hz) for a chopping frequency of 210 kHz under ±1.25 V supply voltage and 26.5 dB voltage gain. At the same simulation condition, the total power consumption is 5 μW only.
Keywords :
CMOS analogue integrated circuits; gas sensors; low noise amplifiers; microsensors; power amplifiers; CHS-A; MEMS gas sensor; frequency 210 kHz; gain 26.5 dB; high resistive gas sensor detection; low voltage chopper stabilized CMOS amplifier; low-noise chopper stabilized CMOS amplifier; low-power chopper stabilized CMOS amplifier; power 5 muW; size 0.35 mum; voltage -1.25 V; voltage 1.25 V; CMOS integrated circuits; Choppers; Frequency modulation; Gain; Noise; Power demand; CMOS circuits; Gas sensor; amplifier; chopper modulation; filter; low-noise; low-power;
Conference_Titel :
Mixed Design of Integrated Circuits and Systems (MIXDES), 2011 Proceedings of the 18th International Conference
Conference_Location :
Gliwice
Print_ISBN :
978-1-4577-0304-1
