Title :
A 1 V 1.2 μW 4th order bandpass switched-opamp SC filter for a cardiac pacer sensing stage
Author :
Baschirotto, A. ; Bijno, D. ; Castello, R. ; Montecchi, F.
Author_Institution :
Dept. of Innovation Eng., Lecce Univ., Italy
Abstract :
A 4th-order bandpass switched-capacitor (SC) filter to be used as a part of an implantable device has been designed. The power consumption reduction is a key feature of such a system. This has been achieved by using a 1 V supply (SC operation are guaranteed by using the switched-opamp technique). In addition the active devices operate in the subthreshold region. The filter uses a fully differential topology to reduce the clock feedthrough noise and increase the dynamic range. The filter has been designed in a 0.35 μm CMOS technology. It operates at 1 kHz sampling frequency and it consumes about 1.2 μW
Keywords :
CMOS analogue integrated circuits; band-pass filters; integrated circuit noise; low-power electronics; operational amplifiers; pacemakers; switched capacitor filters; 0.35 micron; 1 V; 1 kHz; 1.2 muW; 4th order bandpass SC filter; CMOS switched-capacitor filter; CMOS technology; biomedical electronics; cardiac pacer sensing stage; clock feedthrough noise reduction; dynamic range; fully differential topology; implantable device; power consumption reduction; subthreshold region; switched-opamp SC filter; Band pass filters; CMOS technology; Capacitors; Circuits; Clocks; Energy consumption; Frequency conversion; Muscles; Noise reduction; Topology;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.856024
