Sensor Signal Digitization Utilizing a Band-Pass Sigma-Delta Modulator

Lukas FUJCIK  Linus MICHAELI  Jiri HAZE  Radimir VRBA  

IEICE TRANSACTIONS on Electronics   Vol.E92-C    No.6    pp.860-863
Publication Date: 2009/06/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E92.C.860
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Section on Analog Circuits and Related SoC Integration Technologies)
analog-digital conversion,  sigma-delta modulation,  digital signal processing,  mixed analog-digital integrated circuits,  

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This paper presents a system architecture for sensor signal digitization utilizing a band-pass sigma-delta modulator (BP ΣΔM). The first version of the proposed system architecture was implemented in 5 V 0.7 µm CMOS technology. The proposed system architecture is useful for our capacitive pressure sensor measurement. The paper describes the possibilities of using the proposed enhanced system architecture in impedance spectroscopy and in capacitive pressure sensor measurement. The BP ΣΔM is well suited for wireless applications. This paper shows another way how to use its advantages.