Title :
A fully integrated two-channel A/D interface for the acquisition of cardiac signals in implantable pacemakers
Author :
Gerosa, Andrea ; Maniero, Andrea ; Neviani, Andrea
Author_Institution :
Dept. of Inf. Eng., Univ. of Padova, Italy
fDate :
7/1/2004 12:00:00 AM
Abstract :
This work presents an input stage for a cardiac pacemaker fully integrated in 0.35-μm CMOS technology. The system can acquire and digitize to 8 bits both atrial and ventricular electrical activity. Log-domain circuits are exploited to amplify and filter the input signal, while ΣΔ modulation is exploited to convert it. The design is power optimized, indeed the current consumption is limited to 2.9 μA, while the power supply ranges from 2.8 to 1.8 V. The total area is 2.2 mm2 and experimental data prove correct filtering and a total dynamic range of at least 47 dB.
Keywords :
CMOS integrated circuits; bioelectric potentials; circuit optimisation; filtering theory; pacemakers; sigma-delta modulation; 0.35 microns; 1.8 to 2.8 V; 2.9 muA; CMOS technology; atrial electrical activity; cardiac pacemaker; cardiac signals acquisition; current consumption; fully integrated A-D interface; implantable pacemakers; input signal; log-domain circuits; power optimization; sigma-delta modulation; two-channel A-D interface; ventricular electrical activity; Batteries; Biomedical measurements; CMOS technology; Dynamic range; Filtering; Filters; Integrated circuit measurements; Integrated circuit technology; Pacemakers; Voltage; Analog-to-digital converter; biomedical; cardiac pacemaker; sigma-delta;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2004.829921
