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National Semiconductor
Introduction:
There are many misconceptions around Fractional N PLLs. One of them is that they require different design equations and simulation techniques that are used for integer N PLLs. In fact, they use the same concepts and equations. The difference, though, is the performance. By having smaller N value, Fractional N PLLs theoretically have better phase noise performance. Although Fractional N PLLs contain compensation circuitry for the fractional spurs, typically it is still a net improvement. This webinar will address some of the misunderstanding of fractional N PLLs, introduce the advantages and disadvantages of fractional N PLLs over integer N PLLs, fractional N PLL design consideration as well as design tricks.
 
National Semiconductor
Subject: Hot-Swap Technology for Backplane
Time: 2008.12.12  fPre-register
Introduction:
TCA and uTCA are getting popular in today's infrastructure systems. We see an increasing number of designs with bus supporting multiple daughter cards. The first Hot-swap control chip was introduced to reduce the inrush current when plugging a card into the backplane. Now, the hot-swap technology is far more mature.
In this seminar, we will discuss how the control scheme affects hot-swap reliability, stability and overall cost. Also, we’ll show you some test waveforms to demonstrate how an intelligent current-power limit combined technology helps with hot-swap interface design.