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Technology Stocks : Rambus (RMBS) - Eagle or Penguin -- Ignore unavailable to you. Want to Upgrade?

To: pheilman_ who wrote (71583)	5/2/2001 5:31:48 PM
From: Ali Chen	Respond to of 93625

"So, my take is that in order to narrow the scope enough to be novel the Rambus patent applies only to chips with two external clock signals. This doesn't include SDRAM chips. Where is my mistake?" Your "mistake" is very deep:) Their original idea was to use one clock "from master", and another clock "to master", where the clock propagates from chips to controller, and back, and phase relationship is different for every chip in the chain. To perform reads and writes "syncronously", they derive something in between (why would someone do this I wonder), using an awkward and complex circuitry, and half of Rambus patents are devoted to descriptions of this wonderful circuitry. The brilliance is that they called the clocks as "first clock" and "second clock". Now the DDR uses _differential_ clock, and Rambus claims that the two (highly inter-related) DDR clocks can be named as "first clock" and "second clock", and therefore the DDR infringe their inventions too. Very simple.