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A very low-power CMOS mixed-signal IC for implantable pacemaker applications

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6 Author(s)
Wong, L.S.Y. ; Cardiac Rhythm Manage. Div., Sunnyvale, CA, USA ; Hossain, S. ; Ta, A. ; Edvinsson, J.
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Low power consumption is crucial for medical implant devices. A single-chip, very-low-power interface IC used in implantable pacemaker systems is presented. It contains amplifiers, filters, ADCs, battery management system, voltage multipliers, high voltage pulse generators, programmable logic and timing control. A few circuit techniques are proposed to achieve nanopower circuit operations within submicron CMOS process. Subthreshold transistor designs and switched-capacitor circuits are widely used. The 200 k transistor IC occupies 49 mm2, is fabricated in a 0.5-μm two-poly three-metal multi-Vt process, and consumes 8 μW.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:39 ,  Issue: 12 )