Title :
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
Abstract :
In this paper, the design methodology of a fully integrated gm-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;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1328227
