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Over the past couple of decades, more and more applications are going digital. Implementation of digital systems is very simple as it is entirely about logic; however, complexity increases exponentially with signal speed, specifically clock synchronization, setup and hold time, jitter, and so on. These problems affect the functionality of not only the individual subsystem but also cause electromagnetic interference (EMI) when high frequency devices are operating in close proximity. Figure 1 shows a typical example of EMI caused by a DVD player on TV reception.
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