Improvement of Power Supply Rejection Ratio in Wheatstone-bridge based piezoresistive MEMS - LIRMM - Laboratoire d’Informatique, de Robotique et de Microélectronique de Montpellier Access content directly
Journal Articles Analog Integrated Circuits and Signal Processing Year : 2012

Improvement of Power Supply Rejection Ratio in Wheatstone-bridge based piezoresistive MEMS

Abstract

This paper deals with the design of MEMS-based sensors with piezoresistive transduction. It is demonstrated that when the sensor topology does not allow a perfect matching of resistances in the conditioning circuit (typically a Wheatstone bridge), the resolution of the system is limited by the ability to reject power supply noise. As this ability increases when the output offset of the bridge decreases, the proposed architecture implements a feedback loop to control MOS transistors inserted in the Wheatstone bridge to compensate resistor mismatches. This zero-offset bridge exhibits a very good offset cancellation and therefore a better resolution.

Dates and versions

lirmm-00803645 , version 1 (22-03-2013)

Identifiers

Cite

El Mehdi Boujamaa, Frédérick Mailly, Laurent Latorre, Pascal Nouet. Improvement of Power Supply Rejection Ratio in Wheatstone-bridge based piezoresistive MEMS. Analog Integrated Circuits and Signal Processing, 2012, 71 (1), pp.1-9. ⟨10.1007/s10470-010-9504-6⟩. ⟨lirmm-00803645⟩
136 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More