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This study discusses the design process of a novel fully autonomous ultra-low power hybrid RF/photovoltaic energy harvesting system. As a result of the simulated and measured relationship between the output voltage of the rectifier and the load resistance value, the optimal rectifier topology and the charge tank capacitor value are analytically determined. One proof-of-concept designed and fabricated...
Electrode-to-resonator gaps as small as 13.2nm achieved on a 59.5-MHz capacitive-gap transduced disk resonator have now enabled a measured electromechanical coupling strength (Cx/Co) greater than 1.62% at a bias voltage of only 5.5V while retaining an unloaded Q of 29,640, for a kt2Q product of 480 that sets the record at VHF. Several key discoveries contribute to this successful demonstration, including...
In this paper the issues related to the ability to modernize the neutral point of compensated MV grid and benefits associated with it are presented. In neutral point, one of two ways, introduces an additional voltage source that changes the conditions of the earth fault current and makes it easier to detect. This is particularly important when considering the work of fault current passage indicators...
A practical system for reading out from linear, multi-level, selectorless Resistive Random Access Memory (RRAM) arrays based on a Trans-Impedance Amplifier (TIA) approach is presented and studied. SPICE simulation of the core of the system is performed in order to extract predicted sensitivity to error factors such as non-zero TIA offsets and access resistance. A physical implementation of the system...
In this work key aspects of the electroforming in RRAM cells with HfO2 oxide and Pt electrodes are addressed. Specifically, transient measurements were performed on extremely short timescales to characterize systematically the forming time and the resistance after forming as a function of the voltage pulse geometry and the device area.
Fault location in distribution feeders is a difficult task. Traditional impedance-based fault location methods assume that all feeder sections have the same impedance characteristics. This assumption introduces errors on feeders having sections with different conductor types and different tower configurations. This paper describes a new impedance-based method that uses the impedances and length of...
The BIPM has developed a new Josephson Voltage Standard (JVS) that will replace the present transportable standard in the near future. The old system has been involved in 17 international comparisons at the level of 10 V in the framework of the BIPM direct on-site JVS key comparison since 1994. The heart of the new primary standard will still consist of arrays of SIS junctions. It will be able to...
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