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The method of conjugate-image impedance is used to design the matching network for the capacitive intra-body communication channel. Narrow passbands around 20 MHz are observed in the measured responses of the matched cases, where the transmission levels are about 20 dB higher than the unmatched ones. The method versatility is also validated.
Intrabody communication (IBC) is a promising technology that enables the improvement of digital healthcare devices. IBC uses the human body as a transmission media, and the accurate transmission model is important for the design of transceivers. In the measurements of transmission characteristics, baluns have been widely used to separate the grounds of transmitter and receiver. In this work, we analyze...
High uniform current distribution, good endurance, and low 28 µW switching power are successfully achieved in Ni/GeOx/TiOy/TaN resistive random access memory devices on flexible polyimide substrate. The good performances are attributed to the nitrogen-rich TaN to increase the oxidation resistance and decrease the TaON and oxygen vacancies formation from x-ray photoelectron spectroscopy measurements,...
We report a resistive random-access memory (RRAM) using stacked GeO2 and PZT. Under unipolar mode operation, the Ni/GeO2/PZT/TaN RRAM shows a good DC cycling of 2×103 cycles, 85 °C retention, and large resistance window about 120x, which is better than that shown by the single-layer Ni/PZT/TaN RRAM without the covalent-bond-dielectric GeO2.
The HfTiO/Y2O3 stacked dielectric is proposed as the dielectric of metal-insulator-metal (MIM) capacitor. Y2O3 is more thermodynamically stable than HfTiO as contacting with TaN electrode. Interfacial layer thickness and leakage current density can be reduced by inserting a thin Y2O3 layer between HfTiO and TaN. The negative quadruple voltage coefficient of capacitance (VCC-α) of Y2O3 cancels out...
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