EMI control for VLSI biosensor circuitry

Author

Babij, T.M. ; Heimer, M.L. ; Costa, P.

Author_Institution

Dept. of Electr. Eng., Florida Int. Univ., Miami, FL, USA

fYear

1988

fDate

4-7 Nov. 1988

Firstpage

872

Abstract

Design and fabrication techniques are presented which can be applied to improve the performance of biological processing devices in the presence of electromagnetic interference (EMI). A VLSI-compatible antialiasing filter was constructed and tested for application in an implanted medical device. The circuit consists of a continuous-time low-pass filter, a decimation filter, and a combined sample-and-hold and low-pass filter stage. The prefilter was implemented using a second-order Sallen-Key filter, although the chip version would substitute a passive first-order RC circuit. The frequency response of the combined filter stages is such that biosignals from DC to 150 Hz are within the passband while higher frequencies, including those caused by EMI, are rejected.<>

Keywords

biomedical electronics; electromagnetic interference; 0 to 150 Hz; VLSI biosensor circuitry; continuous-time low-pass filter; decimation filter; electromagnetic interference; frequency response; implanted medical device; passive first-order RC circuit; second-order Sallen-Key filter;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1988. Proceedings of the Annual International Conference of the IEEE

Conference_Location

New Orleans, LA, USA

Print_ISBN

0-7803-0785-2

Type

conf

DOI

10.1109/IEMBS.1988.95205

Filename

95205