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This paper describes the use of modeling to improve the accuracy of a sampling system built around a Sigma-Delta analog-to-digital converter. The parameters of the model were established using waveforms from a programmable Josephson array. The validation results have shown that the achievable accuracy is within 8 µV/V for signals in the frequency range up to 1.3 kHz at equivalent sampling rates below...
The accuracy of the amount and uniformity of glue coating perform an important role in the stability and release property of the optical fiber bobbin. In manual glue application way, accuracy and uniformity of the coating are hard to precisely control and efficiency is very low. Based on characteristics of the applied glue and demands of optical fiber winding, a control system for automatic glue spraying...
This paper compares the performances of an optical voltage transformer (OVT) and a conventional voltage transformer (VT) in a laboratory for steady state and transients. It also presents a developed equivalent circuit model for OVT. In addition, OVT impulse response has been investigated, and field records have been evaluated to confirm that optical systems can satisfactorily replace magnetic transformers...
In this paper we discuss performance results of a novel real-time closed-loop power amplifier (PA) linearization technique that has originally been proposed by Ahmed and Li. The novel approach performs on-the-fly prediction and measurement of the PA AM/AM and AM/PM non-linearity, stores such non-linear characteristics and calculates their inverse functions in order to pre-distort the base-band amplitude...
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