Journal ArticleDOI
A very low power CMOS mixed-signal IC for implantable pacemaker applications
Louis Wong,S. Hossain,A. Ta,L. Weaver,G. Shaquer,A. Walker,Jörgen Edvinsson,D. Rivas,H. Naas,A. Fawzi,A. Uhrenius,J. Lindberg,J. Johansson,P. Arvidsson +13 more
- Vol. 39, Iss: 12, pp 2446-2456
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TLDR
In this paper, a very low power interface IC used in implantable pacemaker systems is presented, which contains amplifiers, filters, ADCs, battery management system, voltage multipliers, high voltage pulse generators, programmable logic and timing control.Abstract:
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 mm/sup 2/, is fabricated in a 0.5-/spl mu/m two-poly three-metal multi-V/sub t/ process, and consumes 8 /spl mu/W.read more
Citations
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Journal ArticleDOI
A Comparative Numerical Study on Piezoelectric Energy Harvester for Self-Powered Pacemaker Application.
TL;DR: A micro‐spiral‐shaped piezoelectric energy harvester that scavenges energy from blood pressure variation in the cardiac cycle can be a miniaturized perennial source of power that could even eliminate the need for replacement of conventional batteries used in current pacemaker technology.
Journal ArticleDOI
A noise-shaping SAR ADC for energy limited applications in 90 nm CMOS technology
TL;DR: An ultra-low-power successive approximation register analog-to-digital converter (ADC) for energy limited applications is presented, enhanced by using a noise-shaping technique which does not need any integrator and only uses a finite impulse response (FIR) filter.
Proceedings ArticleDOI
An ultralow-power CMOS transconductor design with wide input linear range for biomedical applications
TL;DR: An ultralow-power CMOS linear transconductor design operating in weak inversion for low frequency gm-C filter design for potential biomedical applications, where the transconductance should be low to reduce the capacitor size, and linear to minimize distortion.
Proceedings ArticleDOI
An 8-bit single-ended ultra-low-power SAR ADC with a novel DAC switching method
TL;DR: An 8-bit single-ended ultra-low-power successive approximation register (SAR) ADC with a novel DAC switching method is designed and fabricated in a 0.35-μm BCD (bipolar-CMOS-DMOS) technology and targeted to be used as part of the ultra- lowpower analog front-end circuit of an implantable cardioverter defibrillator (ICD).
Journal ArticleDOI
Powering Solutions for Biomedical Sensors and Implants Inside the Human Body: A Comprehensive Review on Energy Harvesting Units, Energy Storage, and Wireless Power Transfer Techniques
TL;DR: In this article , the authors present existing issues and challenges related to the state-of-the-art solutions used for harvesting energy to power implantable devices and provide a brief overview of various power architectures found in the literature.
References
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Patent
Meter for measuring battery charge delivered in an implantable device
TL;DR: In this paper, an improved apparatus and method for providing a measurement of the charge depleted from a battery used in an implantable device such as a cardiac pacemaker is described, which is provided not by measuring the voltage level or impedance of the battery, but rather by continuously measuring the electrical current drawn from the battery and integrating that measured current over an integration time period.
Proceedings ArticleDOI
A four chip implantable defibrillator/pacemaker chipset
TL;DR: In this article, a system of four integrated circuits along with discretes that form part of an implantable defibrillator is described, along with a 12-bit integrating analog-to-digital converter that monitors several system utility voltages including battery terminal voltage.
Proceedings ArticleDOI
An 8-bit microcomputer with analog subsystems for implantable biomedical applications
L.J. Stotts,K.R. Infinger +1 more
TL;DR: A description is presented of a single-chip, microcomputer-based pacemaker system in which high-level analog functions are integrated on the same IC as a 8-bit microcomputer and a DC-DC converter.
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