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 language||English (US)|
|Journal||Proceedings - IEEE International Symposium on Circuits and Systems|
|State||Published - Jan 1 1999|
|Event||Proceedings of the 1999 IEEE International Symposium on Circuits and Systems, ISCAS '99 - Orlando, FL, USA|
Duration: May 30 1999 → Jun 2 1999