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This paper presents the first micro-scale process for local deposition and direct writing of metal films through sputtering of a micromachined target electrode. The deposition process is achieved via a highly confined micro glow plasma generated between the electrode's tip and the substrate at atmospheric pressure. Using cylindrical copper electrodes with diameters down to 40 μm, a micro glow is stably...
This paper presents a non-contact human machine interface to sense the position or bio-activity of human body. Based on the electrical response of power transferring coil to the physical shapes, impedance, and dielectric constant of human body, the proposed architecture can be easily integrated and allows the smart devices to read information including physical position or cardiorespiratory activity...
A levitation system, which is composed of a highly oriented pyrolytic graphite (HOPG) rotor and NdFeB permanent magnets, is proposed in this paper. The diamagnetic force between the HOPG rotor and the NdFeB magnets contributes to between the HOPG rotor and the NdFeB magnets contributes to the levitation and friction-free rotation of the rotor. The rotor is first designed as a disc with four blades...
Due to its strong piezoelectricity compared with other polymers, Poly (Vinylidene Fluoride) (PVDF) has been widely utilized in areas of energy, biology and sensor. Researches have shown that both orderly stretching and polarization treatment can strengthen the piezoelectric properties of PVDF. In this work, non-uniform field electrospinning is adopted to fabricate aligned PVDF fibers. The relationship...
A 20 μW wirelessly powered implantable neural recording system, with adaptively tuned bandwidth and sample rate, utilizes a duty-cycled amplifier and communication scheme to minimize power. Backscattering and a supply-current-modulated AFE allow for remote powering or battery operation, with amplifier current of 0.8 μA. The circuit occupies 1.54 mm2 in 0.13 μm CMOS.
This paper reports a highly integrated neural tag for biosignal streaming data recording. The analog front-end uses a time multiplexed architecture with tunable bandwidth amplifiers, a shared output stage and 8-bit SAR ADC, and achieves an NEF of 2.7 with input referred noise of 18nV/√Hz. Streaming digitized signal recordings are packetized and transmitted via a low power 915MHz backscattering modulator...
This paper reports a highly integrated battery operated multi-channel instrumentation system intended for physiological signal recording. The mixed signal IC has been fabricated in standard 0.5μm 5V 3M-2P CMOS process and features 32 instrumentation amplifiers, four 8b SAR ADCs, a wireless power interface with Li-ion battery charger, low power bidirectional telemetry and FSM controller with power...
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