%0 Journal Article
	%A Arup K. George and  Wai Pan Chan and  Zhi Hui Kong and  Minkyu Je
	%D 2012
	%J International Journal of Electronics and Communication Engineering
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 69, 2012
	%T A Micro-Watt Second Order Filter for a Chopper Stabilized MEMS Pressure Sensor Interface
	%U https://publications.waset.org/pdf/13840
	%V 69
	%X This paper describes a low-power second-order filter
for a continuous-time chopper stabilized capacitive sensor interface,
integrated with a fully differential post-CMOS surface-micromachined
MEMS pressure sensor. The circuit uses a single-ended
folded-cascode operational amplifier and two GM-C filters connected
in cascade. The circuit is realized in a 0.18 μm CMOS process and
offers differential to single-ended conversion. The novelty of the
scheme is the cascade of two GM-C filters to achieve a second-order
filter while minimizing power dissipation. The simulated filter cutoff
frequency is 1.14 kHz at common-mode voltage 1.65 V,
operating from a 3.3 V supply while dissipating 172μW of power.
The filter achieves an operating range of 1V for an output load of
1MOhm and 10pF.
	%P 899 - 901