Title :
A 1-μA front end for pacemaker atrial sensing channels with early sensing capability
Author :
Lentola, L. ; Mozzi, A. ; Neviani, A. ; Baschirotto, A.
Author_Institution :
Medico S.p.A., Rubano, Italy
Abstract :
A low-power front end for a pacemaker atrial sensing channel based on level detection is presented. The very tight system specifications in terms of power consumption and output noise, the need to operate with a supply voltage decreasing from 2.8 to 2 V during the battery lifetime, and additional functionalities with respect to standard front ends, like gain programmability and early sensing, make the design of this system a challenge. The front end includes a preamplifier and a third-order switched capacitor filter, and it is fabricated in a 0.8 μm CMOS technology. It features a 1 μA current consumption at a supply voltage of 2.7 V, and an input referred total noise of 6.9 μVrms.
Keywords :
CMOS integrated circuits; gain control; low-power electronics; mixed analogue-digital integrated circuits; pacemakers; programmable circuits; switched capacitor filters; 0.8 micron; 1 muA; 2 to 2.8 V; CMOS technology; battery operation; early sensing capability; gain programmability; level detection; low-power front end; output noise; pacemaker atrial sensing channels; power consumption; preamplifier; switched capacitor filter; third-order SC filter; Batteries; CMOS process; CMOS technology; Energy consumption; Filters; Heart; Pacemakers; Preamplifiers; Signal design; Voltage;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
DOI :
10.1109/TCSII.2003.813591
