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sharps_eng
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re: BenQ K60 e-reader: Trying to stand on the shoulders of giants
sharps_eng   10/24/2010 10:25:17 PM
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There looks to be more BOM cost given to PSU functions than anything else, after the CPU. Of course the PSU earns its keep by getting max battery life from this CPU/display/memory but switchers are also a source of EMI, control of which adds more components. I look forward to wide-range 200MHz converters with built-in L and C, sold in such huge qties that the cost is negligible, like the old 78xx series.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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