Title :
A low-power 5.4 kHz CMOS gm-C bandpass filter with on-chip center frequency tuning
Author :
Räisänen-Ruotsalainen, Elvi ; Lasanen, Kimmo ; Sijander, M. ; Kostamovaara, Juha
Author_Institution :
Electron. Lab., Oulu Univ., Finland
Abstract :
A 5.4 kHz, 6th-order elliptic bandpass gm-C filter for portable biomedical applications is described. The circuit includes automatic on-chip center frequency tuning utilizing a 32 kHz system clock as a reference. The aim was to minimize filter area and power consumption. The design has been integrated in a 0.6 μm CMOS process. Core area is 1.07 mm2 of which the tuning circuitry constitutes 0.24 mm2. Measured current consumption of the filter including tuning circuitry is 18 μA with a 3 V supply voltage.
Keywords :
CMOS analogue integrated circuits; band-pass filters; biomedical electronics; biquadratic filters; circuit tuning; elliptic filters; low-power electronics; 0.6 micron; 18 muA; 3 V; 32 kHz; 5.4 kHz; 6th-order filter; CMOS process; active filter; automatic center frequency tuning; biquad filter; elliptic bandpass gm-C filter; low-power bandpass filter; on-chip center frequency tuning; portable biomedical applications; tuning circuitry; Band pass filters; Biomedical measurements; CMOS process; Circuit optimization; Clocks; Energy consumption; Frequency; Power filters; System-on-a-chip; Tuning;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010540
