Power converters generate switching common mode voltage (CMV) through the pulse width modulation (PWM). Several problems occur in drive systems due to generated CMV. These can be dangerous insulation and bearings of electric machine windings. In recent years, many methods have been developed reduce CMV multiphase machines. Symmetrical nine-phase machines with single-neutral are considered this ...

For an ideal amplifier where Acm1 = 0;CMRR2 is infinite and the second stage is tweaked for maximum CMR. Since there is always a small but finite imbalance in the common-mode gains of the first stage, however, the conclusion from the analysis is that the second stage should be adjusted not in isolation but coupled to the first stage with a common-mode voltage applied to the input of the first s...

in this paper, we investigated the necessity and effects of optimal control methods in the stability and performance of a micro-grid that operates in islanded mode. the micro-gird is consisted of a combine heat and power (chp), a capacitor bank (cb), photovoltaic panel (pv) as power generation sources. in addition, battery and the building electricity and thermal load are placed on the load sid...

this paper presents a novel fully differential (FD) ultra high common mode rejection ratio (CMRR) current operational amplifier (COA) with very low input impedance. Its FD structure that attenuates common mode signals over all stages grants ultra high CMRR and power supply rejection ratio (PSRR) that makes it suitable for mixed mode and accurate applications. Its performance is verified by HSPI...

this paper presents novel active filter for mitigation electromagnetic interference (emi) and other adverse effects of pulse width modulation (pwm) inverter-fed ac motor system. an active filter proposed and devised for this system is characterized by sophisticated connection of two small separate filters, capable of mitigating all the adverse effects. this paper provides high frequency models ...

In recent years a host of “new” current-mode continuous-time filters have been proposed. Although there is widespread acceptance of the premise that current-mode structures are more suitable for high frequency and low voltage applications than their voltage-mode counterparts, a valid comparison of voltage-mode and current-mode structures is conspicuously absent in the literature. In an attempt ...

In this paper, we show that for large area imagers the use of a current mode active pixel engine can increase the speed compared to a voltage mode pixel. Changing from a source follower topology to a common source amplifier can increase the charge gain while having no effect on other performance parameters.

This paper, presents an idea for analog current comparison which compares input signal and reference currents with high speed and accuracy. Proposed circuit utilizes amplification properties of common gate configuration, where voltage variations of input current are amplified and a compared output voltage is developed. Cascaded inverter stages are used to generate final CMOS compatible output v...