After 2+ decades of research on design and development of implantable biomedical microsystems, now it is time to organize research achievements in this area in a consolidated and pedagogical form. This paper introduce...
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ISBN:
(纸本)9781467322935
After 2+ decades of research on design and development of implantable biomedical microsystems, now it is time to organize research achievements in this area in a consolidated and pedagogical form. This paper introduces a new graduate course in advanced biomedicalcircuits and systems. Designed for graduate students with electrical and biomedical engineering backgrounds, this course provides a general overview on the multi-disciplinary field of implantable biomedical microsystems. In addition to some introductory materials on physiology and biology where needed, this course comprises extensive contents and in-depth discussions on both system- and circuit-level aspects of the design of implantable microsystems. Moreover, this course also deals with issues concerned with design for implantability and envisions for testability. Wireless interfacing, signal processing, microelectrode array fabrication, and circuit design for implantable neural recording microsystems are studied extensively. Different design aspects of neural stimulation microsystems, cochlear implants, and visual prostheses are also reviewed briefly.
We have proposed a multi-stage motion-tolerant algorithm for reliable extraction of oxygen saturation. We introduce a novel cardiac gating algorithm to suppress effects of motion artifacts caused by venous blood movem...
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ISBN:
(纸本)9781479923465
We have proposed a multi-stage motion-tolerant algorithm for reliable extraction of oxygen saturation. We introduce a novel cardiac gating algorithm to suppress effects of motion artifacts caused by venous blood movement on wearable oximetry sensors. This approach eliminates the motion artifact effectively and results in a much more accurate and reliable oxygen saturation readings compared to traditional measurement techniques. The proposed approach is tested and validated with real-world data captured using forehead and finger sensors from multiple subjects.
A bottom-up approach to designing biomolecular circuits in living cells is based on composing simple working modules to create larger circuits with more complicated functions. For this approach to work, the behavior o...
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ISBN:
(纸本)9781457714702
A bottom-up approach to designing biomolecular circuits in living cells is based on composing simple working modules to create larger circuits with more complicated functions. For this approach to work, the behavior of the modules should be, to some extent, isolated from that of the surrounding modules. Unfortunately, impedance effects in biomolecular systems, called retroactivity, alter the behavior of a module upon interconnection with other systems. In this paper, we perform a mathematical analysis of a Goldbeter-Koshland covalent modification cycle, a recurrent circuit structure in natural signal transduction networks, and demonstrate that it can be tuned to function as an insulating amplifier, hence buffering systems from retroactivity.
This paper presents a bio-impedance spectroscopy device for capturing various physiological signals for wearable applications. The system consists of an analog front-end, ADC, and digital signal processing to accurate...
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ISBN:
(纸本)9781509058037
This paper presents a bio-impedance spectroscopy device for capturing various physiological signals for wearable applications. The system consists of an analog front-end, ADC, and digital signal processing to accurately measure small bio-impedance in the range of 1-120 from the upper arm with an RMSE of 0.07. The bio-impedance is measured for a wide frequency range, 4 kHz to 120 kHz, in only 150 ms to allow continuous monitoring of rapid physiological activity.
A complete low-cost open-source portable ultrasound test bench will be demonstrated for a variety of biomedical imaging applications. The test bench is a programmable 64-channel system with a modular design that can b...
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ISBN:
(纸本)9781538636039
A complete low-cost open-source portable ultrasound test bench will be demonstrated for a variety of biomedical imaging applications. The test bench is a programmable 64-channel system with a modular design that can be easily updated with improved hardware and software for research on wearable and implantable medical ultrasound. Initial imaging results on tissue phantoms will be shown. Moreover, a rigid prototype of a novel wearable conformal ultrasound array with integrated imaging and modulation capabilities will be demonstrated. Preliminary measurement and characterization results of the prototype show promising results with similar to 2.4 MHz bandwidth.
This paper proposes a new coil structure for inductive powering to wearable/implantable biomedical devices. This structure is virtually independent from the direction (and alignment) of the receiving coil relative to ...
ISBN:
(纸本)9781479923465
This paper proposes a new coil structure for inductive powering to wearable/implantable biomedical devices. This structure is virtually independent from the direction (and alignment) of the receiving coil relative to the transmitting coil. In addition to conducting experimental tests and characterizations, the proposed coil structure (energized by a transmitting coil) has been used to power up a real test system designed for wireless neural recording, operating at 1.2V and drawing 48 mW
In this paper we present a PHYSIO-Sensor based on STM proprietary technology able to accurately reconstruct in a portable format both the PPG (PhotoPlethysmoGraphy) signal and Pulse Wave Velocity (PWV).
ISBN:
(纸本)9781538636039
In this paper we present a PHYSIO-Sensor based on STM proprietary technology able to accurately reconstruct in a portable format both the PPG (PhotoPlethysmoGraphy) signal and Pulse Wave Velocity (PWV).
Capacitively coupled wireless power transfer (CPT) is an alternative way to energize the implantable biomedical devices. In order to improve the output power, the conjugate impedance matching method is applied to the ...
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ISBN:
(纸本)9781509006175
Capacitively coupled wireless power transfer (CPT) is an alternative way to energize the implantable biomedical devices. In order to improve the output power, the conjugate impedance matching method is applied to the CPT system for the first time, different from the existing simple impedance matching by only using inductors. Based on the modelling of the capacitive link through tissue medium, the impedance matching circuits can be designed. The advantage of the proposed method is verified by the experiments.
The papers in this special issue were presented at the 2016 ieee biomedical circuits and systems conference (BioCAS) in Shanghai, China, from October 17–19, 2016.
The papers in this special issue were presented at the 2016 ieee biomedical circuits and systems conference (BioCAS) in Shanghai, China, from October 17–19, 2016.
A new Dual-Input Dual-Output energy harvesting boost converter with low power consumption for a Wireless Body Area Network is presented. A thermoelectric generator and solar cell are adopted as energy harvesters to op...
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ISBN:
(纸本)9781457714702
A new Dual-Input Dual-Output energy harvesting boost converter with low power consumption for a Wireless Body Area Network is presented. A thermoelectric generator and solar cell are adopted as energy harvesters to operate a sensor and circuits for signal processing and wireless communication. The proposed chip is implemented in a 0.18-mu m CMOS process. Power consumption of 0.23 mu W is achieved.
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