The Development of a Capacitance-based Biotelemetry System for Implantable Applications PDF Download
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Author:
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ISBN:
Category :
Languages : en
Pages : 170
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Book Description
Most modern biomedical implants implement some form of communications link between the implant and the outside world. This biotelemetry link has many requirements such as data bandwidth and power consumption. Designing an appropriate link that meets these requirements is one of the most significant engineering challenges associated with these implants. Communications methods that are currently used for this link include standard Radio Frequency (RF) approaches, inductively coupled approaches, and load modulation approaches. This thesis describes the development of a unique capacitance-based biotelemetry system for implantable applications. This system consists of two distinct parts: the implanted transmitter and the external body-mounted receiver. The prototype transmitter is based on a custom Application Specific Integrated Circuit (ASIC) fabricated using the AMI 1.5[mu] [micron] process. This ASIC encodes and transmits predetermined data packets by driving two electrodes in a slew-controlled manner, all contained within a biocompatible material. The receiver consists of charge-sensitive amplifier front end using a discriminator to distinguish individual bits. A Field Programmable Gate Array (FPGA) decodes the transmitted data and relays it to a PCbased LabVIEW interface. Test results using a saline-based human tissue model are presented.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 170
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Book Description
Most modern biomedical implants implement some form of communications link between the implant and the outside world. This biotelemetry link has many requirements such as data bandwidth and power consumption. Designing an appropriate link that meets these requirements is one of the most significant engineering challenges associated with these implants. Communications methods that are currently used for this link include standard Radio Frequency (RF) approaches, inductively coupled approaches, and load modulation approaches. This thesis describes the development of a unique capacitance-based biotelemetry system for implantable applications. This system consists of two distinct parts: the implanted transmitter and the external body-mounted receiver. The prototype transmitter is based on a custom Application Specific Integrated Circuit (ASIC) fabricated using the AMI 1.5[mu] [micron] process. This ASIC encodes and transmits predetermined data packets by driving two electrodes in a slew-controlled manner, all contained within a biocompatible material. The receiver consists of charge-sensitive amplifier front end using a discriminator to distinguish individual bits. A Field Programmable Gate Array (FPGA) decodes the transmitted data and relays it to a PCbased LabVIEW interface. Test results using a saline-based human tissue model are presented.
Author: Thomas B. Fryer
Publisher:
ISBN:
Category : Biomedical engineering
Languages : en
Pages : 132
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"With the advent of manned space flight, the National Aeronautics and Space Administration (NASA) has conducted intensive investigations on the physiological makeup of the human body. The last decade has seen major advances in the use of radiotelemetry in physiological research. Revolutionary developments in microelectronics are making possible smaller telemetry systems that can be wholly implanted in laboratory animals. The NASA Ames Research Center has been in the fore-front of such research and has developed many implantable biotelemetry devices now considered by many as a standard method for monitoring physiological functions in animals. This report describes biotelemetry developments at Ames, tracing the evolution of concepts underlying the accurate and reliable biotelemetry systems of today. Such systems are described in sufficient detail for the reader to select designs to meet specific needs. Through its Technology Utilization Program, NASA strives to make the results of such work widely available for the use of those outside the aerospace community. This publication is one of a series intended to achieve those objectives."--Foreword.
Author: Renee Sue DuBore
Publisher:
ISBN:
Category : Biotelemetry
Languages : en
Pages : 148
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Author: Louis David Hanley
Publisher:
ISBN:
Category : Biotelemetry
Languages : en
Pages : 64
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Author: εΎθ²ζ
Publisher:
ISBN:
Category :
Languages : en
Pages : 94
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Author: Ahmed Ibrahim Saleem Al-Kalbani
Publisher:
ISBN:
Category :
Languages : en
Pages : 276
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The development of safe implants is one of the key priorities of biomedical engineering. Healthcare professionals are trying to create new and sophisticated strategies to improve and support people with disabilities using implants. The research described in this thesis focuses on developing a power supply from a wireless source for implants that will also serve as a wireless data telemetry channel for communication purposes. The design analysis of inductive coupled biomedical implant is expanded. The proposed method of powering the implant is a Class-E amplifier. An analytic approach is given in relation to tuning the class-E amplifier to maximize power transfer. This thesis culminates in specific recommendations for system level design including coil design, miniaturisation, coupling distance, stability of power supplies, consistent energy transfer and the ensuing electromagnetic exposure.The telemetry system for data transfer between implants and outside world has been also studied. This bio-telemetry system setup should ensure an optimal data rate, proper energy levels, low error rates, and a reliable power source. The efficiency of the system is crucial for these implants, and the use of efficient and low power consumption amplifiers and modulation schemes has been discussed in detail. The advantages of Pulse Width Modulated - Amplitude Shift Keying (PWM-ASK for short) are presented in comparison to current modulation schemes used in nowadays implants. Beside inductive coupled implants, this thesis also introduces a study of designing a wireless powered biomedical implant using capacitive coupling. A comparison between inductive and capacitive coupling is presented, while considering biotelemetry and power efficiency. A capacitive coupled biomedical implant is demonstrated through mathematical terms and simulations.
Author: Charles J. Amlaner
Publisher: Elsevier
ISBN: 1483189317
Category : Science
Languages : en
Pages : 825
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Book Description
A Handbook on Biotelemetry and Radio Tracking presents the proceedings of an International Conference on Telemetry and Radio Tracking in Biology and Medicine, held in The University of Oxford, Oxford, U.K. on March 20β22, 1979. This book illustrates the advances connected with every aspect of biotelemetry and radio tracking. Organized into five parts encompassing 101 chapters, this compilation of papers begins with an overview of the method that allows assessment or control of biological parameters from animals, subjects, and patients with comparatively little disturbance and restraint. This text then examines radio telemetry as a system for telemetry or communications over great distances. Other chapters consider better transmitter design and construction of radio tracking. This book discusses as well telemetric measurements of hemodynamic response to driving in coronary patients. The final chapter deals with the study of the coastal movements of Atlantic salmon tagged with ultrasonic transmitters. This book is a valuable resource for biological researchers and ecologists.
Author: Thomas Penzel
Publisher: Tectum Verlag DE
ISBN: 9783828890121
Category : Biotelemetry
Languages : en
Pages : 476
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1070
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Author:
Publisher:
ISBN:
Category : Biomedical engineering
Languages : en
Pages : 420
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