Drive and sense interface for gyroscopes based on bandpass sigma-delta modulators

This paper demonstrates a MEMS gyroscope system with extensive use of sigma-delta (ΣΔ) modulation in both, primary and secondary modes. The primary loop has a bandpass ΣΔ-digital-to-analog converter (DAC) driving the primary mass into resonance, which is implemented on a field programmable gate arra...

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Hauptverfasser:	Northemann, T, Maurer, M, Rombach, S, Buhmann, A, Manoli, Y
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	Band pass filters Consumer electronics Delta-sigma modulation Field programmable gate arrays Frequency Gyroscopes Low pass filters Noise shaping Resonance Temperature sensors
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creator	Northemann, T Maurer, M Rombach, S Buhmann, A Manoli, Y
description	This paper demonstrates a MEMS gyroscope system with extensive use of sigma-delta (ΣΔ) modulation in both, primary and secondary modes. The primary loop has a bandpass ΣΔ-digital-to-analog converter (DAC) driving the primary mass into resonance, which is implemented on a field programmable gate array (FPGA). With this strategy of shifting the primary oscillation control into the digital domain, the analog circuit complexity is enormously reduced. A continuous-time (CT) fourth-order micro-electro-mechanical ΣΔ Modulator (ΣΔM) incorporating the secondary resonator is used to convert the Coriolis rate signal into a bit stream. This ΣΔM is implemented on PCB performing an in-band noise (IBN) below -60 dBFS.
doi_str_mv	10.1109/ISCAS.2010.5537911
format	Conference Proceeding
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subjects	Band pass filters Consumer electronics Delta-sigma modulation Field programmable gate arrays Frequency Gyroscopes Low pass filters Noise shaping Resonance Temperature sensors
title	Drive and sense interface for gyroscopes based on bandpass sigma-delta modulators
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