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Design guidelines for low-ripple paralleled converter system are proposed. Current and voltage ripples in output capacitor of paralleled converter system depend on duty ratio and number of converter modules. The ripples are estimated through a simplified circuit model which is available for any paralleled converter system. Optimum design example for paralleled system with low voltage-ripple is described...
The output voltage of DC-DC converter contains the ripple and it substantially affects the frequency response although the ripple is usually neglected in the control circuit as PWM control. The authors already have clarified that the effect of the ripple is not ignorable for the frequency response and it causes the unusual characteristics. In this paper, we analyze the effect of the ripple in consideration...
A new two-terminal circuit modeling is presented. This equivalent circuit, called Hybrid equivalent circuit or simply H-model, can replace a Thevenin or a Norton equivalent circuit, which both are shown to be two special cases of an H-model. The H-model contains both voltage and current sources and is shown to be very flexible and dynamic. For students in circuit courses this is only one equivalent...
An implementation scheme of low-power and high slewing rate follower for CSTN-LCD system is presented in this paper. Auxiliary charging and discharging modules are adopted in order to meet the low-power and high slewing rate demands simultaneously. Cascade frequency compensation is used to obtain better frequency response properties and improve the Power Supply Rejection Ratio (PSRR) of the circuit...
In this paper, a study based on the different models of the skin impedance is carried out. The purpose is to examine the drug delivery method through iontophoresis, which relies on active transportation of the charged medication agent within an electric field. It is a kind of transdermal drug delivery method, and hence the method has to handle the variability in skin characteristics of a patient....
In infrared focal plane arrays (IRFPA) applications, variable gain of capacitor feedback transimpedance amplifier (CTIA) cells in readout integrated circuit (ROIC) is required to achieve a widely dynamic range and keep CTIA cells away from saturation. Selectable integration capacitors CTIA cell and a counter-based novel timing control circuit are proposed and presented in this paper. With the two...
A PWL (PieceWise Linear) model of the new found memristor is proposed in this article. A simple second order circuit containing an inductor, a capacitor, a resistor and a memristor serves as an example to illustrate the application of this model. The circuit equation is established then Matlab simulation is performed. It is believed from this example that the model could provide satisfactory result...
This paper exploits a new charge pump used in integrated solar energy harvesting systems to improve the power efficiency under ultra low supply of under 0.7 V supplied by on-chip photodiodes. Compared with conventional charge pumps, improvements of 20% in terms of output voltage gain and conversion efficiency can be achieved by using two symmetrical branches and PMOSFET-only transfer transistors per...
The speeds of computers need to increase. A limitation to increasing this speed is the layout design of printed circuit boards (PCB's). One of the critical limiting factors of the PCB is the orientation of differential capacitors with respect to one another. This paper determines the optimal orientation of these capacitors in order to reduce the return loss (DS11) from crosstalk as the speeds of computers...
A novel CRLH cell is hereby presented providing easy integration and reconfigurability. First, the straight access line to the interdigital-capacitor was replaced by a bent access to improve the propagation without using cumbersome tapered access. Second, a stub-capacitor was added to facilitate the reconfigurability providing added degree of freedom for the values of the circuit model. These modifications...
Based on the transmission line theory considering radiation effects, the authors have examined the meta-structured leaky wave antennas (MLWA) in terms of scanning capability and reflection coefficients near the design frequency of 2 GHz. The theoretical scanning angle when N=30 is estimated to be from 63deg to 60deg. The paper have also provided some convenient closed-form equations for circuit parameters...
The model of static VAr generator (SVG) is carried out by state space averaging modeling and instantaneous reactive power theory. Based this model, the bivariate PI control strategy is applied in SVG. The DC-voltage reference is unascertainable in the control strategy, because of the equivalent resistance of the model is a nonlinear variable. Based on the model, the accurate mathematical model of...
A new single-element-controlled current-mode quadrature oscillator circuit using second-generation current conveyors (CCIIs) is presented. The proposed oscillator is consisted of two CCIIs, two grounded capacitors and three grounded resistors. The circuit is beneficial to monolithic integrated circuit implementation by the use of grounded passive components. In addition, a new current-controlled sinusoidal...
The trend in high-speed digital circuits is to increase in speed and density, consume more current and to operate at lower voltage. This fast increase in the maximum current consumption and switching speed combined with the decrease of the operating voltage causes the allowable absolute voltage variations to decrease, which makes the PDS design a more challenging task than ever. Decoupling capacitors...
The behavior of a novel frequency divider circuit using negative differential resistance (NDR) circuit is studied. This NDR circuit is made of resistors (R) and bipolar-junction-transistor (BJT) devices. It can show the NDR characteristic in its combined current-voltage curve by suitably arranging the resistances. We call this NDR circuit as R-BJT-NDR circuit in this paper. A chaos circuit consisted...
This paper introduces a novel current-mode biquadratic circuit using only plus type differential voltage current-controlled current conveyors (DVCCCs) and grounded capacitors. The biquadratic circuit is constructed with two plus type dual current output DVCCCs (DO-DVCCCs) and two grounded capacitors. The circuit can realize biquadratic circuit transfer functions by choosing the appropriate input and...
The contribution is concerned on the properties of the new ideal circuit element, a memristor. By definition, a memristor relates the charge q and the magnetic flux ?? in a circuit, and complements a resistor R, a capacitor C, and an inductor L as an ingredient of ideal electrical circuits. The properties of these three elements and their circuits are a part of the standard curricula. The existence...
A new grounded-capacitor single resistance controlled sinusoidal oscillator (SRCO) with explicit current output using two current conveyors (CCs) and five passive elements is presented. The proposed circuit offers (i) independent control of condition of oscillation and frequency of oscillation, (ii) low active and passive sensitivities, (iii) use of both the grounded capacitors (suitable for IC implementation)...
A simple circuit technique to realise a floating inductance simulator for system response compensation is presented in this paper. The circuit implementation is based on the use of the operational transconductance amplifiers (OTAs) as active elements. The proposed circuit converts a grounded capacitance into a floating inductance with electronically variable properties. The proposed inductor is attractive...
The contribution is concerned on the properties of the new ideal circuit element, a memristor. By definition, a memristor relates the charge q and the magnetic flux in a circuit, and complements a resistor R, a capacitor C, and an inductor L as an ingredient of ideal electrical circuits. The properties of these three elements and their circuits are a part of the standard curricula. The existence of...
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