The ideal transmission cable exhibits little parasitic capacitance between individual internal cable conductors and also between the conductors and the cable shielding. However, transmission cables possessing high parasitic capacitance are becoming increasingly common in the glass coating industry. Cables designed for increased flexibility and reduced costs often provide minimal spacing between...

ac Impedance spectroscopy and transient techniques in different time domains were benchmarked for their benefit to determine rated capacitances of supercapacitors quickly and reliably, for example in industrial quality control. Scaling factors are presented to estimate rated dc capacitance by extrapolating 1 Hz ac capacitance: roughly 1.5 for acetonitrile systems, and 5 for propylencarbonate. A...

We have fabricated magnetic tunneling junctions by oxidizing a wedge-shaped aluminum layer to produce junctions with ideal oxidized as well as under and over oxidized junctions on a single wafer. By investigating the capacitance spectra, we are able to study the effects due to interface charge accumulation. The electron–electron interaction among accumulated interface charges leads to a voltage...

S1. Geometry dependence of circuit components: a) Geometric Capacitance )) : For a parallel plate system, the geometric (dielectric) capacitance is given by where is the area of the electrodes, permittivity of the medium separating the electrodes and the separation between the electrodes. This results from the solution of Poisson equation and is determined by the ratio of charge on the electrod...

We have developed a highly sensitive integrated capacitance bridge for quantum capacitance measurements. Our bridge, based on a GaAs HEMT amplifier, delivers attofarad (aF) resolution using a small AC excitation at or below k(B)T over a broad temperature range (4-300 K). We have achieved a resolution at room temperature of 60 aF/√Hz for a 10  mV ac excitation at 17.5 kHz, with an improved resol...

This research aimed at measuring the electrical capacitance of miscanthus biomass as a potential proxy measure of bulk density. The experimental arrangement allowed for continuous variation of bulk density through compression, whereas moisture content was varied at two levels, being air-dried (<5%) and oven dried (14.5%), and particle size was varied by using material that passed milling screen...

A method for measuring muscle fiber capacitance using small test pulses applied with the three-microelectrode voltage clamp is presented. Using this method, three membrane potential-dependent changes in capacitance were observed: (a) Capacitance of polarized fibers increased by 5--15% with depolarization from V less then -100 mV to voltages slightly below the contraction threshold. (b) Capacita...

Low-energy density has long been the major limitation to the application of supercapacitors. Introducing topological defects and dopants in carbon-based electrodes in a supercapacitor improves the performance by maximizing the gravimetric capacitance per mass of the electrode. However, the main mechanisms governing this capacitance improvement are still unclear. We fabricated planar electrodes ...

In this paper, a grounding capacitance multiplier is presented. This block is very important because he presents a better solution to resolve the problems occured by the integration of high capacitance value or the problem of tuning that value of the capacitance. We emphasize the fact that the presented applications are well suited for integration since their value can be tuned by simple action...

We report a detailed theoretical investigation on electrochemical capacitance of a nanoscale capacitor where there is a DC coupling between the two conductors. For this “leaky” quantum capacitor, we have derived general analytic expressions of the linear and second order nonlinear electrochemical capacitance within a first principles quantum theory in the discrete potential approximation. Linea...