Results 251 to 260 of about 565,160 (298)

Characterization of Current Transformers in the Presence of Harmonic Distortion

2008 IEEE Instrumentation and Measurement Technology Conference, 2008
The CTs performance under distorted conditions are usually characterized by means of the frequency response test. In this paper a new way to characterize CTs, closer to real operative conditions, is proposed. The harmonic phase angle and ratio errors are measured when the CTs are excited with a nonsinusoidal current composed of a fundamental and one ...
Cataliotti A, Di Cara D, Emanuel, AE, Nuccio S   +4 more
openaire   +1 more source

Intermodulation distortion in current-commutating CMOS mixers

IEEE Journal of Solid-State Circuits, 2000
The nonlinearity behavior of CMOS current-switching mixers is investigated. By treating the mixer as a periodically-time-varying weakly nonlinear circuit, we study the distortion-causing mechanisms and we predict the mixer distortion performance. Normalized graphs are provided from which the designer can readily estimate the mixer nonlinearity for ...
Manolis Terrovitis, Robert G. Meyer
openaire   +1 more source

The Measurement of Distortion Current and Distortion Power

IEEE Transactions on Instrumentation and Measurement, 1984
A converter for resolving current or voltage into three mutually orthogonal components-active, reactive, and distortion-is suggested. The described system confirms the possibility of measuring the distortion current and distortion power on the basis of the time-domain approach.
openaire   +2 more sources

Distortion analysis of switched-current circuits

ISCAS '98. Proceedings of the 1998 IEEE International Symposium on Circuits and Systems (Cat. No.98CH36187), 2002
A distortion analysis based on the large signal behavior of the basic switched-current memory cell is presented. In the first part, based on a closed form solution of the step response, distortion due to the settling error is addressed. In the second part, distortion caused by clock-feedthrough is analysed. The solutions are compared with simulated and/
M. Helfenstein, G.S. Moschytz
openaire   +1 more source

Influence of harmonic distortion in current transformer

2016 17th International Conference on Harmonics and Quality of Power (ICHQP), 2016
This study aims to evaluate the performance (accuracy assessment) of current transformers in the presence of harmonic distortion. Using the software ATP-Alternative Transients Program, an equivalent CT circuit model was validated and the simulation results were compared with tests performed in prototypes.
Evandro Marcos Vaciloto Filho, Marilia Machado Ribeiro, Paula Gallo Salome, Paulo F. Ribeiro   +3 more
openaire   +1 more source

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, 2002
Harmonic 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, 1985
A 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, 2004
Current 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), 2017
The 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, 1994
The 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