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tomblund
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re: Jedec readies DDR4 memory spec
tomblund   9/19/2011 1:02:43 PM
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If there's Rambus tech being used in DDR4 they should get paid but Hynix and Micron has a history of stealing patented designs. Hynix paid a huge fine to DOJ and employees went to jail for it. Micron rolled over and got leniency even though they were the ring leader. Maybe DOJ one day will wake up and understand this but i doubt it, Micron has to many influential people in their pocket.

tomblund
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re: Jedec readies DDR4 memory spec
tomblund   9/19/2011 1:00:09 PM
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Rambus left JEDEC years ago and then JEDEC proceeded to steal all of rambus patented designs. I will bet there's (stolen) Rambus tech in DDR4.

joshxdr
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re: Jedec readies DDR4 memory spec
joshxdr   8/24/2011 2:49:40 PM
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@fdunn: I would be surprised if RAMBUS does not collect royalties for each DDR4 chip sold. With Qimonda gone, Micron and Elpida fading, we will be left with a Samsung-Hynix Korean duopoly. DDR4 may be the last JEDEC spec. Samsung and Hynix can just make their own spec and force it on the market.

DrFPGA
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re: Jedec readies DDR4 memory spec
DrFPGA   8/23/2011 11:41:57 PM
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Is CRC going to impact latency or thruput? Would anyone use non-ECC memory architecture at these lithographies? Many questions...

fdunn0
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re: Jedec readies DDR4 memory spec
fdunn0   8/23/2011 12:37:15 AM
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Please tell me that RAMBUS is not a memeber of this working group! Also is RAMBUS going to be filing law suits against all manufacturers?

selinz
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re: Jedec readies DDR4 memory spec
selinz   8/22/2011 9:14:01 PM
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So assuming a june 2012 release, what does history suggest as the timeframe of widespread adoption in the PC industry.



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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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