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Signaling optimization techniques to reduce jitter and crosstalk susceptibility

Sevcik B., Brancik L., Kubicek M., Sotner R.

International Journal of Microelectronics and Computer Science

2011

Vol. 2, nr 3

113-120

In this paper the optimization methods to reduce undesirable effects in time-domain pre-emphasis techniques are described. In the first case the application of data-dependent method for pulse-width modulated (PWM) pre-emphasis to reduce additional jitter at output data stream is shown. Consequently, new signaling scheme based on using of raised cosine approximation to crosstalk reduction is proposed and analyzed. The time-domain pre-distortion method provides an alternative to FIR (finite impulse response) pre-emphasis with advantages in the light of developments in modern CMOS scaling. The PWM pre-emphasis method is able to compensate higher channel losses than the conventional FIR method. However additional high-frequency noise which is typical for strong amount of PWM pre-emphasis can caused system crosstalk susceptibility. Our research is primary focused on optimization of the conventional PWM scheme to reduce harmonic high frequency component. It can be solution for system where near-end crosstalk is problem. Finally, simulation results in MathCAD and Agilent ADS environment are shown.

The influence of the surface defects concerning drawing processes of the micro-alloyed steel

Rusz S., Kubicek M., Pastrnak M., Filipec P., Greger M., Petruska J., Janicek L.

Hutnik, Wiadomości Hutnicze

2005

Vol. 72, nr 2

118-121

This paper provides a report on the effect of the pass reduction concerning the strain course in wires made of micro-alloyed steel, 23MnB4; namely successively investigating three particular points - before the die, in the die itself, and at the die output section so that the strain condition is mapped in its very detail, which is of fundamental importance for the behaviour of surface defects in the process of drawing the wire.

Artykuł przedstawia wpływ gniotu w przebiegu odkształcenia drutów wykonanych ze stali mikrostopowej 23MnB4, mianowicie w trzech następujących po sobie punktach: przed ciągadłem, w ciągadle i w strefie wyjścia z ciągadła, w ten sposób warunki odkształcenia zostały zobrazowane szczegółowo. Ma to istotny wpływ na zachowanie defektów powierzchni w procesie ciągnienia drutów.