A fully integrated 0.5-7 Hz CMOS bandpass amplifier

Author

Arnaud, Alfredo ; Galup-Montoro, Carlos

Author_Institution

Fac. de Ingenieria, Univ. de la Republica, Montevideo, Uruguay

Volume

1

fYear

2004

fDate

23-26 May 2004

Abstract

In this paper, the design methodology of a fully integrated g_m-C, 0.5-7 Hz band-pass amplifier is presented. The amplifier is designed to be employed in signal conditioning of a piezoelectric accelerometer, which is part of an implantable biomedical device. Transconductances of the OTAs range from 30 pS to 100 nS. Such low values of transconductances, which are required owing to the large time-constants involved, were obtained with the aid of a current division technique. Measurement results for OTA structures and part of the filter fabricated in a standard 0.8 μm technology are presented.

Keywords

CMOS integrated circuits; band-pass filters; biomedical electronics; integrated circuit design; operational amplifiers; piezoelectric devices; 0.5 to 7 Hz; 0.8 micron; 30000 to 100 nS; OTA; band-pass amplifier design; current division; filter fabrication; implantable biomedical device; integrated CMOS bandpass amplifier; piezoelectric accelerometer; signal conditioning; time-constant; transconductance; Accelerometers; Active filters; Capacitive sensors; Circuits; Design methodology; Low-frequency noise; Nonlinear filters; Preamplifiers; Topology; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on

Print_ISBN

0-7803-8251-X

Type

conf

DOI

10.1109/ISCAS.2004.1328227

Filename

1328227