The Design of a Fully Differential Capacitive Pressure Sensor with Unbalanced Parasitic Input Capacitances in 130nm CMOS Technology

B. T. Bradford, W. Krautschneider, D. Schroeder

Abstract

A switched capacitor amplifier for measuring absolute pressure with a micro-machined capacitive pressure sensor using correlated double sampling has been designed in 130nm CMOS technology. The switched capacitor amplifier design uses a combination of correlated double sampling, input offset cancellation, and output offset cancellation to help reject 1f noise and DC offset mismatch. A method for sizing the operational transconductance amplifier (OTA) components according to the system noise, accuracy, and bandwidth requirements is presented.

References

  1. Baker, R. (2011). CMOS: Circuit Design, Layout, and Simulation. IEEE Press Series on Microelectronic Systems. Wiley.
  2. Bradford, B., Krautschneider, W., and Schroeder, D. (2012). Wireless power transmission for powering medical implants situated in an abdominal aortic aneurysm. In 46th annual conference of the German Society for Biomedical Engineering (BMT 2012), pages 941-944, Jena, Germany.
  3. Bradford, B., Krautschneider, W., and Schroeder, D. (2013). A gain boosted folded cascode using telescopic boosting amplifiers with switched capacitor input level shifters. The IASTED International Conference, Biomedical Engineering.
  4. Buhk, J., Bradford, B., Koops, A., Schroeder, D., Krautschneider, W., and Adam, G. (2010). An integrated stent-graft for non-invasive 4-dimensional aneurysm sac pressure monitoring after endovascular aortic aneurysm repair. In RSNA 2010, pages LLVIS-WE4A, Chicago, Il, USA.
  5. Enz, C. C. and Temes, G. C. (1996). Circuit techniques for reducing the effects of op-amp imperfections: autozeroing, correlated double sampling, and chopper stabilization. Proceedings of the IEEE, 84(11):1584-1614.
  6. Murmann, B. (2012). Thermal noise in track-and-hold circuits: Analysis and simulation techniques. Solid-State Circuits Magazine, IEEE, 4(2):46 -54.
Download


Paper Citation


in Harvard Style

T. Bradford B., Krautschneider W. and Schroeder D. (2013). The Design of a Fully Differential Capacitive Pressure Sensor with Unbalanced Parasitic Input Capacitances in 130nm CMOS Technology . In Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 1: BIODEVICES, (BIOSTEC 2013) ISBN 978-989-8565-34-1, pages 137-142. DOI: 10.5220/0004237801370142


in Bibtex Style

@conference{biodevices13,
author={B. T. Bradford and W. Krautschneider and D. Schroeder},
title={The Design of a Fully Differential Capacitive Pressure Sensor with Unbalanced Parasitic Input Capacitances in 130nm CMOS Technology},
booktitle={Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 1: BIODEVICES, (BIOSTEC 2013)},
year={2013},
pages={137-142},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004237801370142},
isbn={978-989-8565-34-1},
}


in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 1: BIODEVICES, (BIOSTEC 2013)
TI - The Design of a Fully Differential Capacitive Pressure Sensor with Unbalanced Parasitic Input Capacitances in 130nm CMOS Technology
SN - 978-989-8565-34-1
AU - T. Bradford B.
AU - Krautschneider W.
AU - Schroeder D.
PY - 2013
SP - 137
EP - 142
DO - 10.5220/0004237801370142