In this work, a numerical approach has been proposed to estimate the five single-diode circuit model physical parameters of photovoltaic generators from their experimental current-voltage characteristics. Linear least square method used solve system three linear equations express shunt resistance, saturation current and photocurrent as function series resistance ideality factor. Two key points ...

In this paper, an inductorless CMOS realization of Chua s circuit [IEEE Trans. Circ. Syst.––I 1985;32:798] is presented. The circuit is derived from the dimensionless form of Chua s circuit and can generate Rossler or double-scroll attractors by changing a single capacitor s value. Variables are represented in the current domain to facilitate adding or subtracting variables. New Gm–C representa...

A series of Schottky diodes based on single GaN nanowires has been fabricated. Based the data small-signal frequency analysis (parameter S 21 ) diode structures at various bias voltages, parameters corresponding equivalent electrical circuit were determined. It is shown that cutoff fabricated reaches 27.5 GHz. Keywords: GaN, nanowires, microwave band, diode.

This paper presents SCR-based circuit extensions to a diode rectifier to allow regeneration during braking and ride-through during voltage sags. The proposed topology uses two line-commutated SCR bridges – one connected to the dc bus rails and the other to the dc bus center-tap. The inverting SCR bridge connected to the dc bus rails transfers energy from the dc link to the mains during regenera...

Abstract: Models for photovoltaic (PV) cells and panels, based on the diode equivalent circuit, have been widely used because they are effective tools for system design. Many authors have presented simplified one-diode models whose three or four parameters are calculated using the data extracted from the datasheets issued by PV panel manufactures and adopting some simplifying hypotheses and num...

This paper tries to estimate the capital investment required for the fixed-telephony network switching equipment as demanded by the fourth national development plan. As a first step, the Cobb-Douglas model is used as a successful demand forecasting model to estimate the demand over the target years. Then, an architectural plan is developed for the fixed-telephony switching network that takes in...

This paper tries to estimate the capital investment required for the fixed-telephony network switching equipment as demanded by the fourth national development plan. As a first step, the Cobb-Douglas model is used as a successful demand forecasting model to estimate the demand over the target years. Then, an architectural plan is developed for the fixed-telephony switching network that takes in...

A new circuit is proposed for a steep step-up of the line voltage. It integrates a switched-capacitor (SC) circuit within a boost converter. An SC circuit can achieve any voltage ratio, allowing for a boost of the input voltage to high values. It is unregulated to allow for a very high efficiency. The boost stage has a regulation purpose. It can operate at a relatively low duty cycle, thus avoi...

In this paper, we implement a circuit topology for the gold standard ATX80+.The total output power is 255 watts under full load operation. An active-clamping ZVS forward converter is adopted to provide main power and in secondary side, the BUCK circuit technology is adopted to provide 3 sets power +12V, +5V and +3.3V. To eliminate the current harmonics and to achieve high power factor, an activ...