Direct AC analysis of idealized switched-capacitor circuits in Spice-compatible programs is described in the paper. The capacitor is described by a special macro-circuit, whose mathematical model is based on modified zdomain charge equations and on the theory of equivalent signals.

A switched capacitor circuit which simulates Frequency Dependant Negative Resistor is proposed. The circuit is controlled by three phases clock and needs one unity gain buffer. A comparison among SC FDNRs in other references is shown. SWITCAP simulation of SC filter using these circuits are also shown. Key-Words; Switched-Capacitor(SC) Frequency Dependant Negative Resistor(FDNR) Filter immittan...

Parasitic inductance cancellation is applied to a surface mount shunt capacitor that is connected through a screw to a chassis ground plate separate from the reference planes of the PCB. This filter is demonstrated to have considerably better filtering performance than a comparable conventional shunt capacitor arrangement from 60 MHz to 800 MHz in a 50-Ω system.

This paper has developed a novel multiobjective function for optimal sizing and sitting of Distributed Generation (DG) units and capacitor banks in simultaneous mode to improve reliability and reduce energy losses. The proposed function consists of four objectives: Cost of Energy Not Supplied (CENS), System Average Interruption Duration Index (SAIDI), costs of energy loss and investment. A nove...

Most of the losses in a power system relate to the distribution sector which always has been considered. From the important factors which contribute to increase losses in the distribution system is the existence of radioactive flows. The most common way to compensate the radioactive power in the system is the power to use parallel capacitors. In addition to reducing the losses, the advantages o...

Two capacitors of equal capacitance C are connected in parallel by wires of negligible resistance and a switch, as shown in the lefthand figure below. Initially the switch is open, one capacitor is charged to voltage V0, and charge Q0 = CV0, while the other is uncharged. At time t = 0 the switch is closed. If there were no damping (dissipative) mechanism, the circuit would then oscillate foreve...

In this paper, two possible switched capacitor implementations of companding lters are discussed. The governing di erence equations, an estimate of the increase in the dynamic range for a given power consumption and possible topologies are given.

We present the design of tunable capacitor based on MEMS simulated using COMSOL Multiphysics, which is an emerging engineering software environment used for modelling and simulation of any physical based structure. This model includes an electrostatic simulation for a given distance component in various microelectromechanical systems (MEMS) for electromagnetic fields in the radio frequency rang...

Low-power switched-mode power supply converters are used in applications where size and efficiency are critical. The buck converter size can be reduced by elimination of the bulky filter capacitor. The filtering function of this capacitor can be replaced by an output current ripple compensation circuit. The compensating circuit is applied, based on inductor current measurement and linear amplif...