A design strategy for a rail-to-rail input / output operational amplifier in standard CMOS 0.18 μm digital process with a 0.5-V threshold is presented. It uses a novel level shifting technique of the input signal and a dynamically biased class AB output stage based on a switched-capacitor configuration. The amplifier is capable of working with a power supply as low as 1-V while providing a 26.6...

polarization for au/pb(zr ti )o /yba cu o ferroelectric capacitor has been studied and measured by pulse method. a sequence of pulses with amplitudes varying from 0 to 10 volts in 2 volt steps is applied and a conventional polarization curve is obtained by integrating the charge flow from the polarization switching induced by the voltage ramp. a value of 25?c/cm2 is measured for the saturated p...

In this project photovoltaic array is used as source. The photovoltaic energy is used to feed the inverter through the step up converter. The output for solar module is connected to the battery. So the supply is given continuously by the battery to the system. The output of the solar may vary due to the radiation and will affect the battery. So the lifetime of battery is reduced. It is necessar...

An input/output feedback linearization control strategy is developed for control of three-level three-phase neutral-point-clamped rectifier using its dual Lagrangian modeling. The load current of the rectifier can be given in two forms: (i) the load current involving the current of capacitor C1 (ii) the load current involving the current of capacitor C2. Applying the obtained load current to th...

A fully integrated successive-approximation (SAR) switched-capacitor (SC) DC–DC converter is presented that overcomes the coarse output voltage resolution limitation of traditional SC converters. An SAR SC converter cascades multiple stages of 2:1 SC converters, and achieves a fine-grained conversion ratio resolution of VIN/2 , where VIN is the input voltage and N is the number of stages. As th...

A new voltage control method for single-phase full-bridge PWM inverters that having an output LC filter is proposed in this paper. The proposed voltage controller has a capability to realize a zero steadystate output voltage error with fast response. The zero steady-state output voltage error is achieved by using a controller that is derived by using the virtual LC resonant circuit. Fast respon...

Self excited induction generators (SEIG) are widely used to harness energy from wind power. However, maintaining constant voltage output from SEIG with varying loads and wind speeds is still a major challenge. This paper proposes a control scheme which provides stable voltage output with changing loads and widely varying wind speeds. A capacitor is employed to provide the bulk excitation for th...

In this paper, we present a systematic technique to design bandpass LC Σ∆ modulators with sinusoidal feedback DACs. The output resistance of the DAC degrades the quality factor of the LC resonator and the DAC output capacitance modifies its resonance frequency. It is shown that the DAC output resistance should be taken into account while designing the Q enhancement circuit of the integrated LC ...

In the application of rail transit vehicles, when using typical wireless power transfer (WPT) systems with series–series (SS) compensation supply power for supercapacitors, the output current is in an approximately inverse relationship with the duty cycle in a wide range. This renders the typical buck circuit control inappropriate. In order to help resolve the above issues, this paper designs i...