Results 221 to 230 of about 86,396 (265)
Some of the next articles are maybe not open access.
Harmonic distortion in switched-current circuits
Proceedings of 1997 IEEE International Symposium on Circuits and Systems. Circuits and Systems in the Information Age ISCAS '97, 2002Harmonic distortion in basic Switched-Current (SI) cells is investigated and closed-form equations are presented here, for the first time, concerning the effects of V/sub t/ mismatch, clock-feedthrough, and signal dependent output conductance. We show that with short channel transistors the variation of the output conductance is the dominant source of ...
J.M. Martins, V.F. Dias, M.M. Silva
openaire +1 more source
Nonlinear distortion in current-feedback amplifiers
Microelectronics Journal, 1985A systematic method to characterize the nonlinear distortion in current-feedback amplifiers is described in this paper. This technique is easy to apply and allows us to determine analytical expressions for 2nd and 5th coefficients of harmonic distortion for single stage amplifiers. It is also applicable to differential pairs.
Pedro A. Martinez, Manuel Lozano
openaire +1 more source
A compensation algorithm for the distorted secondary current of a current transformer
Eighth IEE International Conference on Developments in Power System Protection, 2004Current transformer (CT) saturation may cause the mal-operation or operating time delay of protection relays. In this paper, a new algorithm for the compensation of the distorted secondary current due to CT saturation is suggested. The secondary current can be expressed as the linear combination of sinusoidal and exponential signals, if no saturation ...
openaire +1 more source
Voltage and current distortion generated by the CNC
2017 Progress in Applied Electrical Engineering (PAEE), 2017The paper presents the results of voltage and current measurements performed in electrical drive system of CNC machines. The tests were made for different operation states of devices. We analysed the influence of nonlinear devices for current and voltage waveforms.
Jacek Bartman, Arkadiusz Palczak
openaire +1 more source
Predicting harmonic distortion in switched-current memory circuits
1993 IEEE International Symposium on Circuits and Systems, 1994The switched-current (SI) technique has recently been proposed as a cheaper alternative to the switched-capacitor (SC) technique. This stems largely from the fact that the analog signal processing functions performed by a SC circuit using linear capacitors and MOS transistors can be replaced by a SI circuit consisting solely of MOS transistors. At this
P. J. Crawley, Gordon W. Roberts
openaire +1 more source
Comprehensive distortion compensation of grid-connected inverter currents
IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society, 2014The paper presents a comprehensive approach to the compensation of phase current distortion of grid-connected power inverters. Four different sources of current distortion are addressed: imperfect grid synchronization caused by the distortion in the grid voltages, voltage fluctuations in the dc link, time delays in the estimation of grid voltages, and ...
Artur Cichowski +3 more
openaire +1 more source
A Low Distortion, Current Feedback, Programmable Gain Amplifier
2005 IEEE International Symposium on Circuits and Systems, 2005A programmable gain amplifier (PGA) is designed in a 0.18 /spl mu/m CMOS process, which makes use of current feedback building blocks. The voltage gain of the PGA can be changed from 0 dB to +60 dB with 2 dB steps and has a -3 dB bandwidth of 20 MHz. The PGA exhibits better than -60 dB spurious free dynamic range (SFDR) over the entire gain range at a ...
Hüseyin Dinc +2 more
openaire +1 more source
Gradient Distortion Correction for Low Frequency Current Density Imaging
2006 International Conference of the IEEE Engineering in Medicine and Biology Society, 2006Current density imaging (CDI) is a technique that uses magnetic resonance imaging (MRI) to measure the distribution of externally applied electric current inside tissues. However, GDI processing is rendered inaccurate by the distortion caused by the nonlinearity of MRI gradient fields. The distortion interferes with the proper registration and the curl
Charles X. B. Yan +2 more
openaire +2 more sources
Improving the Accuracy of Current Transformers through Harmonic Distortion Compensation
2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2019It is common knowledge that conventional current transformers suffer from nonlinear effects due to the magnetization characteristics of their cores. Core saturation may occur because of large overcurrents or unidirectional transient components; however, weak nonlinear effects exist even during normal operation. The typical spectrum of current waveforms
Laurano C., Toscani S., Zanoni M.
openaire +2 more sources
A Novel Approach to Current Transformer Characterization in the Presence of Harmonic Distortion
IEEE Transactions on Instrumentation and Measurement, 2009The current transformer (CT) performance under distorted waveform conditions is usually characterized by means of the frequency-response test. In this paper, a new way to characterize CTs, closer to real operation conditions, is proposed. The harmonic phase-angle and ratio errors are measured using a nonsinusoidal current composed of fundamental and ...
CATALIOTTI, Antonio +3 more
openaire +4 more sources