Download or read book A Multi Channel Wireless Implantable Neural Recording System written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT YIN, MING. A Multi-Channel Wireless Implantable Neural Recording System. (Under the direction of Dr. Maysam Ghovanloo). This dissertation presents a multi-channel implantable wireless neural recording (WINeR) system for electrophysiology and behavioral neuroscience research applications. This system consists of two units: a system-on-a-chip (SoC) transmitter unit and a receiver unit built with off-the-shelf components. A novelty of the WINeR system is in its utilization of a wireless single-slope ADC technique by inserting a wireless link in between a pulse width modulator and a time-to-digital converter (TDC). This technique not only offers the WINeR system the benefit of a single-slope ADC, but also makes the WINeR transmitter unit very simple, low power, and small in regards to chip area. In addition, by directly transmitting pulse width modulation (PWM) signal, the pulse rate over the wireless link is reduced to the sampling rate, while a moderate system resolution can still be achieved. Another novelty of this system is that its transmitter uses an asynchronous (clockless) topology and achieves very low noise levels by eliminating the on-chip clock. Some of the other features of this system are the wideband FSK demodulator and FPGA-based TDC in the receiver unit capable of achieving high resolution, low noise, low power, low cost, and ease of implementation. A 32-channel WINeR transmitter prototype is implemented in a standard CMOS technology, and operates in the 900MHz ISM band. A prototype WINeR receiver is also built using off-the-shelf components with up to 75MHz bandwidth. A custom developed VC++ GUI running on a PC interface with the receiver unit through a USB port and facilitates data storage and visualization. In addition, detailed noise analysis is conducted both theoretically and experimentally to further characterize the performance of the system. Finally, the full functionality of the entire WINeR system has been validated from bench-top.
Download or read book A Multi channel Wireless Implantable Neural Recording System written by Ming Yin and published by . This book was released on 2009 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: neural recording, time to digital converter, implantable, asynchronous, wireless, pulse width modulation.
Download or read book A Neural Recording Front End for Multi channel Wireless Implantable Applications written by Haitao Li and published by . This book was released on 2011 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Low Cost End to End Multi Channel Wireless Neural Recording System written by Benjamin Donald Wood and published by . This book was released on 2018 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past few years neural recording and stimulation technology has advanced rapidly. As new implants and electrode devices are implemented and tested, a full system capable of effectively utilizing them within a medical application has remained unrealized. A mechanism that is able to wirelessly communicate with and control such instruments would drastically increase the ease with which they can be used in scenarios such as free-moving animal experiments, medical studies, and field trials. Certain constraints come with constructing such an end-to-end device, such as limits on power, cost, and size, along with stringent performance requirements on data rates and range. This thesis introduces a fully developed wireless neural recording system. Consisting of a multi-channel neural implant, a small microcontroller relay device, and a tablet running a control application, it is capable of recording and displaying neural data at high speed and long range. Communication between the three components is accomplished purely through wireless transmissions, utilizing inductive coils to transfer data through the patient's tissue along with an 802.11 WiFi to establish a link and facilitate transmission between the microcontroller and control software. The control software gives the researcher freedom to specify recording parameters such as the amount of data desired, sampling speed, recording channels, and format of the data to be sent from the implant. Upon data reception, the software processes the received data, creating a time series of neural points per channel that can be graphed, displayed, and downloaded. This modular and simple approach to an end-to-end wireless recording system will allow cutting edge neural implants to be quickly integrated into full solutions that can be used in neurological and biomedical research.
Download or read book Wireless Power Transfer and Data Communication for Neural Implants written by Gürkan Yilmaz and published by Springer. This book was released on 2017-01-01 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents new circuits and systems for implantable biomedical applications targeting neural recording. The authors describe a system design adapted to conform to the requirements of an epilepsy monitoring system. Throughout the book, these requirements are reflected in terms of implant size, power consumption, and data rate. In addition to theoretical background which explains the relevant technical challenges, the authors provide practical, step-by-step solutions to these problems. Readers will gain understanding of the numerical values in such a system, enabling projections for feasibility of new projects.
Download or read book Wireless Cortical Implantable Systems written by Vahid Majidzadeh Bafar and published by Springer Science & Business Media. This book was released on 2013-03-19 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless Cortical Implantable Systems examines the design for data acquisition and transmission in cortical implants. The first part of the book covers existing system level cortical implants, as well as future devices. The authors discuss the major constraints in terms of microelectronic integrations are presented. The second part of the book focuses on system-level as well as circuit and system level solutions to the development of ultra low-power and low-noise microelectronics for cortical implants. Existing solutions are presented and novel methods and solutions proposed. The third part of the book focuses on the usage of digital impulse radio ultra wide band transmission as an efficient method to transmit cortically neural recorded data at high data rate to the outside world. Original architectural and circuit and system solutions are discussed.
Download or read book Multichannel Wireless Neural Recording Systems Using Standard WLAN Modules and ASIC Micro system Components written by Jayant Parthasarathy and published by . This book was released on 2006 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Implantable Neural Prostheses 2 written by David Zhou and published by Springer Science & Business Media. This book was released on 2010-07-10 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: Signi?cant progress has been made in the development of neural prostheses for restoration of human functions and improvement of the quality of life. Biomedical engineers and neuroscientists around the world are working to improve the design and performance of existing devices and to develop novel devices for arti?cial vision, arti?cial limbs, and brain-machine interfaces. This book, Implantable Neural Prostheses 2: Techniques and Engineering Approaches, is part two of a two-volume sequence that describes state-of-the-art advances in techniques associated with implantable neural prosthetic devices. The techniques covered include biocompatibility and biostability, hermetic packaging, electrochemical techniques for neural stimulation applications, novel electrode materials and testing, thin-?lm ?exible microelectrode arrays, in situ char- terization of microelectrode arrays, chip-size thin-?lm device encapsulation, microchip-embedded capacitors and microelectronics for recording, stimulation, and wireless telemetry. The design process in the development of medical devices is also discussed. Advances in biomedical engineering, microfabrication technology, and neu- science have led to improved medical-device designs and novel functions. However, many challenges remain. This book focuses on the engineering approaches, R&D advances, and technical challenges of medical implants from an engineering p- spective. We are grateful to leading researchers from academic institutes, national laboratories, as well as design engineers and professionals from the medical device industry who have contributed to the book. Part one of this series covers designs of implantable neural prosthetic devices and their clinical applications.
Download or read book Low powder and High rate Wireless Transmission Systems for Neural Implants written by Henrique Do Carmo Miranda and published by Stanford University. This book was released on 2011 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neural recording systems are fundamental to the advancement of brain-machine interfaces that can significantly improve the quality of lives of patients with neurological diseases, such as spinal cord injuries or quadriplegia. This thesis presents two newly developed wireless neural recording systems that are able to provide a high degree of usability and neural decoding accuracy. They are capable of simultaneously transmitting 32 to 96 channels of neural signals detected by an implanted neural sensor array. This work was carried out within the framework of the Hermes project and its technical design challenges will be addressed. The Hermes project is aimed at primarily developing hardware and software tools that extract neural information from the motor cortex. Those tools can enable practical prosthetic devices used to significantly ameliorate the life of patients with neurological impairments that directly affect motor functions. The first developed system, HermesD, is a 32-channel broadband transmission system using an FSK modulated carrier at 24 Mbit/s in the 3.7-4.1 GHz band. The link range extends beyond 20 m and the total power consumption is 142 mW. The HermesD system uses only COTS components and can be easily replicated. HermesD is fully operational and is currently used to transmit broadband neural data for neuroscience research in the Neural Prosthetic Systems Laboratory (NPSL) at Stanford University. HermesD is also planned as the base platform for future human trials to take place in the same laboratory. The second system that represents the next Hermes generation, HermesE, uses a novel UWB transmitter architecture implemented in a custom IC in the 65-nm CMOS technology. The transmitted signal bandwidth covers the 3.6 to 7.5 GHz frequency range. The time domain waveform is digitally programmable, allowing a very flexible control of the output spectrum to avoid interference and to allow multi-band operation. The UWB transmitter chip is part of a 96-channel broadband recording system delivering 40 Mbit/s. Its power consumption is 230 uW for a communication range of about 5 m. The antenna subsystems for these wireless recording devices presented a design challenge given the requirements for small size, large bandwidth and high efficiency. While HermesD has an operating FBW of 10%, HermesE is much more demanding in this respect, with 70% FBW, requiring unconventional antenna structures. The design techniques and performance of the antennas required to meet the specifications of both systems are also addressed in this work.
Download or read book A Wireless Microsystem for Multichannel Neural Recording Microprobes written by Hao Yu and published by . This book was released on 2004 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Ultra Low Power Implantable Neural Recording System for Brain machine Interfaces written by Woradorn Wattanapanitch and published by . This book was released on 2011 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past few decades, direct recordings from different areas of the brain have enabled scientists to gradually understand and unlock the secrets of neural coding. This scientific advancement has shown great promise for successful development of practical brain-machine interfaces (BMIs) to restore lost body functions to patients with disorders in the central nervous system. Practical BMIs require the uses of implantable wireless neural recording systems to record and process neural signals, before transmitting neural information wirelessly to an external device, while avoiding the risk of infection due to through-skin connections. The implantability requirement poses major constraints on the size and total power consumption of the neural recording system. This thesis presents the design of an ultra-low-power implantable wireless neural recording system for use in brain-machine interfaces. The system is capable of amplifying and digitizing neural signals from 32 recording electrodes, and processing the digitized neural data before transmitting the neural information wirelessly to a receiver at a data rate of 2.5 Mbps. By combining state-of-the-art custom ASICs, a commercially-available FPGA, and discrete components, the system achieves excellent energy efficiency, while still offering design flexibility during the system development phase. The system's power consumption of 6.4 mW from a 3.6-V supply at a wireless output data rate of 2.5 Mbps makes it the most energy-efficient implantable wireless neural recording system reported to date. The system is integrated on a flexible PCB platform with dimensions of 1.8 cm x 5.6 cm and is designed to be powered by an implantable Li-ion battery. As part of this thesis, I describe the design of low-power integrated circuits (ICs) for amplification and digitization of the neural signals, including a neural amplifier and a 32-channel neural recording IC. Low-power low-noise design techniques are utilized in the design of the neural amplifier such that it achieves a noise efficiency factor (NEF) of 2.67, which is close to the theoretical limit determined by physics. The neural recording IC consists of neural amplifiers, analog multiplexers, ADCs, serial programming interfaces, and a digital processing unit. It can amplify and digitize neural signals from 32 recording electrodes, with a sampling rate of 31.25 kS/s per channel, and send the digitized data off-chip for further processing. The IC was successfully tested in an in-vivo wireless recording experiment from a behaving primate with an average power dissipation per channel of 10.1 [mu]W. Such a system is also widely useful in implantable brain-machine interfaces for the blind and paralyzed, and in cochlea implants for the deaf.
Download or read book Wireless Power Transfer and Data Communication for Intracranial Neural Recording Applications written by Kerim Türe and published by Springer Nature. This book was released on 2020-03-04 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes new circuits and systems for implantable wireless neural monitoring systems and explains the design of a batteryless, remotely-powered implantable micro-system, designed for continuous neural monitoring. Following new trends in implantable biomedical applications, the authors demonstrate a system which is capable of efficient remote powering and reliable data communication. Novel architecture and design methodologies are used for low power and small area wireless communication link. Additionally, hermetically sealed packaging and in-vivo validation of the implantable device is presented.
Download or read book Neural Interfacing written by Thomas D. Coates and published by Morgan & Claypool Publishers. This book was released on 2008 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past 50 years there has been an explosion of interest in the development of technologies whose end goal is to connect the human brain and/or nervous system directly to computers. Once the subject of science fiction, the technologies necessary to accomplish this goal are rapidly becoming reality. In laboratories around the globe, research is being undertaken to restore function to the physically disabled, to replace areas of the brain damaged by disease or trauma and to augment human abilities. Building neural interfaces and neuro-prosthetics relies on a diverse array of disciplines such as neuroscience, engineering, medicine and microfabrication just to name a few. This book presents a short history of neural interfacing (N.I.) research and introduces the reader to some of the current efforts to develop neural prostheses. The book is intended as an introduction for the college freshman or others wishing to learn more about the field. A resource guide is included for students along with a list of laboratories conducting N.I. research and universities with N.I. related tracks of study. Table of Contents: Neural Interfaces Past and Present / Current Neuroprosthesis Research / Conclusion / Resources for Students
Download or read book Single chip Wireless Microsystems for Multichannel Neural Biopotential Recording written by Pedram Mohseni and published by . This book was released on 2005 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Implantable Bioelectronics written by Evgeny Katz and published by John Wiley & Sons. This book was released on 2014-02-27 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here the renowned editor Evgeny Katz has chosen contributions that cover a wide range of examples and issues in implantable bioelectronics, resulting in an excellent overview of the topic. The various implants covered include biosensoric and prosthetic devices, as well as neural and brain implants, while ethical issues, suitable materials, biocompatibility, and energy-harvesting devices are also discussed. A must-have for both newcomers and established researchers in this interdisciplinary field that connects scientists from chemistry, material science, biology, medicine, and electrical engineering.
Download or read book Implantable Biomedical Microsystems written by Swarup Bhunia and published by Elsevier. This book was released on 2015-01-28 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research and innovation in areas such as circuits, microsystems, packaging, biocompatibility, miniaturization, power supplies, remote control, reliability, and lifespan are leading to a rapid increase in the range of devices and corresponding applications in the field of wearable and implantable biomedical microsystems, which are used for monitoring, diagnosing, and controlling the health conditions of the human body. This book provides comprehensive coverage of the fundamental design principles and validation for implantable microsystems, as well as several major application areas. Each component in an implantable device is described in details, and major case studies demonstrate how these systems can be optimized for specific design objectives. The case studies include applications of implantable neural signal processors, brain-machine interface (BMI) systems intended for both data recording and treatment, neural prosthesis, bladder pressure monitoring for treating urinary incontinence, implantable imaging devices for early detection and diagnosis of diseases as well as electrical conduction block of peripheral nerve for chronic pain management. Implantable Biomedical Microsystems is the first comprehensive coverage of bioimplantable system design providing an invaluable information source for researchers in Biomedical, Electrical, Computer, Systems, and Mechanical Engineering as well as engineers involved in design and development of wearable and implantable bioelectronic devices and, more generally, teams working on low-power microsystems and their corresponding wireless energy and data links. First time comprehensive coverage of system-level and component-level design and engineering aspects for implantable microsystems. Provides insight into a wide range of proven applications and application specific design trade-offs of bioimplantable systems, including several major case studies Enables Engineers involved in development of implantable electronic systems to optimize applications for specific design objectives.
Download or read book A Miniature Wireless Neural Recording and Stimulating System for Chronic Implantation in Freely Moving Animals written by Mustafa Ashiq Hussain Kanchwala and published by . This book was released on 2018 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioelectronic Medicine Therapies offer a promising alternative to traditional procedures, and implantable devices are crucial for its development. This thesis presents a miniature, low power, 2 channel integrated wireless neural recording and stimulating system with sampling rates of 20ksps to allow researchers to understand the organ functions and develop therapies in freely moving small animals. The wireless implant uses Carbon Nano Tube Yarn (CNTY) electrodes to interface with the peripheral nerves and record signals. High data transmission rates are achieved by using an Ultra-wideband Impulse Radio (UWB-IR) transmitter and wireless switching control is provided by Bluetooth Low Energy (BLE). The UWB transmitter is primarily designed to make it implantable in freely moving rats for long periods of time, to chronically record neural activity in the peripheral nerves and stimulate them wirelessly. Preliminary experiments and bench test results have confirmed its functioning with high data transmission rate and low power consumption.
