Rambus (RMBS) - Eagle or Penguin Message Board

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Technology Stocks : Rambus (RMBS) - Eagle or Penguin

RMBS 90.97

-1.9%

3:16 PM EST

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To: Dave B who wrote (39374)	4/7/2000 10:26:00 AM
From: mishedlo	Read Replies (1) of 93625

Patent Discussion dramreview.com Discussion below from CharredWater on MF Here's my analysis on why DDR will eventually either fade or be subject to Rambus royalities payments: DDR relies on an internal clocking mechanism previously mentioned in Rambus patent 5915105 patents.ibm.com Blatant patent violation. In addition, the clocking signals for data release on a DDR system are limited by the frequency of the data transmission. There is only so much information that can be thrown onto the rising and falling edge of wavesignal without creating unwanted noise. The only way to avoid the speed limitations of SDRAMS (meaning DDR in this case) is to packetize the information, which would infringe on patent 59951143. Sending data on 512 independent busses is not an option. It seems to me that additional development of DDR will necessarily infringe on RMBS patents. This is a great, if consise summary of the argument regarding Micron DDR: "Micron's Figure 2 details the input section of a DDR SDRAM. Again, compared with the diagram on the Rambus patent, it is very similar. The patent language appears to exactly describe the input logic shown in the Micron figure." I look for the Hitachi suit to settle and for royalities to be collected from the vast majority of DRAM on the market by 2003.

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