Title :
A telemetry and interface circuit for piezoelectric sensors
Author :
Nair, Kalyani ; Harjani, Ramesh
Author_Institution :
Dept. of Electr. & Comput. Eng., Minnesota Univ., Minneapolis, MN, USA
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 10× reduction in power for a 10 dB reduction in signal-to-noise ratio. For this design the bandwidth of interest is 10 kHz to 1 MHz and the sensor capacitance size is 100 pF
Keywords :
piezoelectric transducers; signal processing equipment; telemetry; voltage regulators; 10 kHz to 1 MHz; 100 pF; on-chip voltage regulator; piezoelectric sensors; sensor capacitance size; shielded-base bipolar opamp design; signal conditioning circuit; signal-to-noise ratio; two-wire telemetry; Bandwidth; Bipolar transistors; Circuits; Filters; Regulators; Signal design; Signal to noise ratio; System-on-a-chip; Telemetry; Voltage;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.777533
