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Technology Stocks : Rambus (RMBS) - Eagle or Penguin
RMBS 94.82+2.7%Nov 26 3:59 PM EST
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To: Jdaasoc who wrote (38722)3/23/2000 1:10:00 PM
From: Tenchusatsu  Read Replies (1) of 93625
 
John, <Most people think it is the double clocking that infringes RMBS's patent.>

I think this is a widely held misconception. If it's the double-clocking that infringes on the patents, then a lot of other interface standards would infringe on RMBS' patents as well, like AGP, Intel's Itanium bus, AMD's Athlon bus, Compaq/Digital's EV6 bus (actually the same as Athlon bus), etc.

<I believe DDR infringes by the fact it may mux it's control signals on the data bus. RMBS describes this feature on several of it's patents.>

I don't think either do this. As Dave already explained, Rambus has eight signals that are used as a dedicated control bus (three for row packets, five for column packets) along with 16 separate signals for data. DDR also has separate signals for control, I think. The difference is that Rambus double-pumps both control and data packets, while DDR only double-pumps data.

I'll try and find out more on my end, John.

Tenchusatsu
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