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Conditioning and processing of biological signals represent interesting challenges for wearable electronics in health applications. Information gathering from these signals requires complex hardware circuitry and dedicated computation resources. The design of innovative analog front-end integrated circuits, combined with efficient signal processing algorithms, allows the development of platforms for...
A CMOS-based microelectrode array (MEA) with 4225 recording sites and 1024 stimulation sites and a related data acquisition system are presented. The chip provides high spatiotemporal resolution on an active area of 1 mm × 1 mm or 2 mm × 2 mm, respectively, and allows in-vitro neural tissue interfacing experiments with full imaging capability. The entire chip surface is covered by a thin high-k dielectric...
Surface ElectroMyoGraphy (sEMG) is a fundamental tool in medicine, rehabilitation, and prostethics but also made appearance on the consumer world with devices such as the Thalmic lab's MYO. Current state of the art transfers the whole sEMG signal but encounter problems when this signal has to be transferred wirelessly in real-time. To overcome limitations of the current state of the art we propose...
We present a temporal contrast detection event-driven asynchronous 128×128 pixel image sensor with integrated 10-bit ADC intensity readout in 0.18 µm 6M 1P CMOS. Current-mode log-compressed readout with correlated double sampling (CDS) offset compensation provides random access to instantaneous pixel intensity over 75 dB intra-scene dynamic range. Temporal correlated double sampling in “on” and “off”...
This paper presents a fully integrated monitoring system for diagnosing restenosis in coronary-artery stents. Power is transferred wirelessly to the 0.13-µm CMOS monitoring circuit that is embedded on the stent and reads and transmits the sensory data from the pressure sensors which are also embedded on the stent. An auxiliary circuit is introduced to facilitate the alignment of the external reader...
Cardiac output is one of the most determining parameters to assess cardiac function and manage hemodynamically unstable patients. Its continuous and non-invasive estimation, however, remains a technical challenge. In that context, electrical impedance tomography (EIT), an emerging modality for a new class of safe and portable hemodynamic monitors, appears as an appealing candidate for the continuous...
This demo presents a method of visual tracking using the output of an event-based asynchronous neuromorphic event-based camera. The approach is event-based thus adapted to the scene-driven properties of these sensors. The method allows to track multiple visual features in real time at a frequency of several hundreds kilohertz. It adapts to scene contents, combining both spatial and temporal correlations...
This paper proposes a novel palpable and non-invasive continuous sphygmomanometer, with which continuous arterial pressure can be measured based on electromagnetic induction. The proposed sensor can be attached to the measurer's fingertip, and single-degree-of-freedom springs, which are interposed between the side of the measurer's finger and the skin surface side, transmit the arterial pressure to...
Fig. 1(a) shows the demo setup. Two DVS boards send events out through parallel buses to a merger board. This board merges all the event flow in one single AER bus, and sends it to a custom-made convolutional board, where a 2D grid array of convolution modules is implemented within a Spartan6 FPGA, as represented in Fig. 1(b) and (c). A USBAERmini2 board is used to timestamp the events coming out...
We propose an algorithm that uses pressure image data to detect a person's sleeping posture and identifies different body limbs. Our algorithm can be used in monitoring bed-bound patients and assessing the risk of pressure ulceration. We used a GMM-based clustering approach for concurrent posture classification and limb identification. Our proposed technique, applied on 9 healthy subjects instructed...
Lack of accessible medical care in developing countries has prompted a need for low-cost point of care medical diagnostics. Paper based medical diagnostics have been demonstrated as a viable option in these areas due for their simplicity, low-cost and easy disposal. This paper presents a custom CMOS readout IC in conjunction with paper-based electrodes as electrochemical sensors as a low-cost medical...
A variety of cardiovascular conditions such as hypertension are related to the decay in the mechanical properties of blood vessels. We combine continuous wave Doppler ultrasound measurement of blood velocity with high-resolution compressive force sensing to design a sensor to analyze the hemodynamic characteristics of blood vessels. We test the specifications of our device through an ultrasonic phantom...
Multi-channel neural recording devices are widely used for in vivo neuroscience experiments. Incurred by high signal frequency and large channel numbers, the acquisition rate could be on the order of hundred MB/s, which requires compression before wireless transmission. In this paper, we adopt the Compressed Sensing framework with a simple on-chip implementation. To improve the performance while reducing...
Direct electronic interfaces between biological systems and solid-state devices offer considerable advantages over traditional optical interfaces by reducing system costs and affording increased signal levels. Integrating sensor transduction onto a complementary metal-oxide-semiconductor (CMOS) chip provides further advantages by enabling reduction of parasitics and improved sensor density. We present...
Feeding and swallowing disorders are relatively common in early infancy. In Clinical, it shows negative impacts on growth and neurodevelopmental, therefore it has become a high risk of neurodevelopmental delays in preterm infants. Oral feeding that requires suckling, swallowing, and breathing coordination, and it is the most complex sensorimotor process for the newborn infant. Currently, both preterm...
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...
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