In this study, a new graphene ceramic composite (GCC) was prepared based on the reduced grapheneoxide (rGO) doped in sol-gel derived silica. The GCC was prepared by dispersing rGO nanosheets intothe sol-gel precursors containing methyl triethoxysilane, methanol and hydrochloric acid solution.During an acid catalyzed hydrolyze reaction and gelation proc...

Adsorption of benzimidazole, 2-methylbenzimidazole and 2-aminobenzimidazole on mild steel in 3.5 NaCl solution was studied using density function theory DFT calculations. In this regard, charge transfer resistance Rct and double layer capacitance Cdl obtained by electrochemical impedance spectroscopy EIS were used to calculate surface coverage and to build prediction models. When prediction mod...

The gate-drain capacitance and the sourcedrain capacitance of High Electron Mobility transistors have been measured on a computer-aided measurement system. The variation of these capacitances with transistor bias voltages is explained and compared with the trend predicted by a capacitance model used in literature. Differences in measured and calculated results arise from the assumptions used in...

Ferroresonance is a nonlinear dynamic phenomenon, between a non-linear inductor and system capacitance. Hereby a study is undertaken on systems comprising of the required parameters, under which the possibility of ferroresonance may arise. For any operating voltage applied to series combination of capacitance and transformer windings at no-load, the critical value of capacitance to cause ferror...

Recently, a previous contributor showed how the delta-wye conversion may be applied to find the equivalent capacitance of five capacitors arranged in a bridge configuration. In fact, that contributor gave an algorithm for this purpose which showed that the equivalent capacitance depends upon all five capacitors. However, in this paper, we point out that there is a special case where the equival...

High-resolution electronic interface circuits for transducers with nonlinear capacitive impedance need an operational amplifier, which is stable for a wide range of load capacitance. Such operational amplifier in a conventional design requires a large area for compensation capacitors, increasing costs and limiting applications. In order to address this problem, we present a gain-boosted two-sta...

We report on a very fast and low noise front-end, implemented in 0.25μm CMOS technology. The CARIOCA amplifier discriminator chip has input impedance of 10Ω, in order to be compatible with sensors of large capacitance, and a peaking time of 14ns. The conversion gain of 8mV/fC remains almost unchanged up to a detector capacitance of 120pF. A noise figure of 450e at zero input capacitance with a ...

This paper presents a new CAD tool – F3D – for accurate 3D capacitance and distributed RC model extraction for image sensor designs. F3D overcomes limitations of existing parasitic extraction tools and field solvers, and enables a predictive accurate capacitance extraction and distributed RC model generation, automated identification of all relevant capacitive coupling components, including lon...

A reconstruction technique of the gate capacitance from anomalous capacitance-voltage (C–V) curves in high leakage dielectric MOSFETs is presented. An RC network is used to accommodate the distributed nature of MOSFETs and an optimization technique is applied to extract the intrinsic gate capacitance. Applicability of the method is demonstrated for ultra-thin nitride/oxide (N/O 1.4 nm/0.7 nm) c...