Telemetry and interface circuit for piezoelectric sensors

Kavira Nair, Ramesh Harjani

Research output: Contribution to journalConference articlepeer-review

Abstract

In this paper we present a design for a two-wire telemetry and signal conditioning circuit for piezoelectric sensors. The telemetry system uses an on-chip voltage regulator as part of the signal-vs-supply filter. We also introduce a new shielded-base bipolar opamp design that exploits the properties of both MOS and bipolar transistors. The new design results in 10X reduction in power for a 10 dB reduction in signal-to-noise ratio. For this design the bandwidth of interest in 10 KHz to 1 MHz and the sensor capacitance size is 100 pF.

Original languageEnglish (US)
Pages (from-to)V-152-V-155
JournalProceedings - IEEE International Symposium on Circuits and Systems
Volume5
StatePublished - Jan 1 1999
EventProceedings of the 1999 IEEE International Symposium on Circuits and Systems, ISCAS '99 - Orlando, FL, USA
Duration: May 30 1999Jun 2 1999

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