Current starved VCO is simple ring oscillator consisting of cascaded inverters. Differential ring oscillator has a differential output to reject common-mode noise, power supply noise and so on. In this paper we have designed and simulated Current Starved VCO and Differential VCO for PLL in Tanner 13.0v 0.18μm digital CMOS process. Performance comparison is done in terms of high oscillation freq...

control of three phase inverters has been an important issue in recent years. this paper proposes active disturbance rejection control (adrc) scheme for controlling three phase inverters. the main advantage of adrc that motivated us for using this controller for inverter is that it is model independent.  this controller is used in a double loop structure including an inner current loop and oute...

In this paper, CMOS inverter-based wideband transresistance R, amplifiers are proposed and analyzed. Using the R, amplifiers, tunable VHFKJHF R,-C bandpass biquadratic filters can be designed. In these filters, the center frequency f , can be post-tuned by adjusting the control voltages of the R, amplifiers. The pseudodifferential configuration uses the extra inversely connected and self-shorte...

Introduction: High-frequency DC-AC inverters as the LCC inverter shown in Fig. 1 are used in a variety of applications including electronic ballasts and induction heating. Input variations in both the bus voltage (amplitude modulation, AM) and the switching frequency (frequency modulation, FM) result in amplitude variations at the load. A common objective is to model the AC dynamics from input ...

Repetitive control (RC), which can track any periodic signal with a known integer period zero steady-state error, is widely used for current of grid-tied inverters in microgrids. However, the inherent one fundamental time delay, leads to poor dynamic performance. Furthermore, performance conventional RC (CRC) will degrade when operating at high variation grid frequency. Therefore, this paper pr...

Inverters with reduced number of switches have been proposed in the literature to improve the capability of cost reduction, total inverters size and switching losses of dc/ac inverter topologies. In addition, they have a lower probability of damaging the semi-conductor switches as well as lower commonmode currents. This paper proposes new designs for inverters with reduced number of switches. F...

This paper presents the simulation of 3, 5, 7level inverters. The realization of these three different levels is done by cascading one, two, three H-bridges in series respectively in MATLAB. The use of simple control strategy which is applied for switching the switches at appropriate conducting angles with proper delays is presented in this paper. The reduction in harmonics is done with the hel...

Distributed generations (DG’s), based on both synchronous generators (SG’s) and fast inverters, are incorporated to improve power quality and reliability of power grids. These DG’s, however, may cause voltage and frequency stability issues due to weakness in power distribution networks. Weakness not only means significant ratios between resistance and reactance components in impedances (lossy),...

A new phase-controlled resonant inverter is obtained by paralleling the ac loads of two identical parallel resonant inverters. A phase shift between the drive signals of the two inverters controls the amplitude of the output voltage of the new inverter. A voltage-driven rectifier is used as an ac load of the inverter which results in a phase-controlled parallel resonant dc-dc converter. A frequ...