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Technology Stocks : Rambus (RMBS) - Eagle or Penguin
RMBS 101.61+2.8%Dec 5 9:30 AM EST
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To: Barry A. Watzman who wrote (49540)8/13/2000 12:33:38 AM
From: Scumbria  Read Replies (2) of 93625
 
Barry,

Most of the early patents (the 1990 patents) were VERY fundamental in nature: Things like transferring data on BOTH leading and trailing edges of the clock

This technique has been around for a long time. Alan Hume made an interesting post this evening:

"In the mid 70's I was working (in Germany) for a company making high precision electronic weighing equipment. This was all in TTL and pre TMS1000, so our "mpu" was made from counters, flip flop latches, NAND and NOR gates. The clock was an RC oscillator with a circuit to square it off. one day whilst playing around with it, we double clocked it to about 1Mhz as I recall, but the circuit became unreliable due to the slow response time of the ttl logic.
Of course nothing was patented at the time, we just decided to to use both the rising and falling flanks as the trigger.

Message 14205722

and having an on-memory register to hold various memory parameters.

The timing registers in SDRAM were an obvious step from days of asynchronous memory interfaces. Asynchronous memory systems had the timing registers in the memory controller. When synchronous memory interfaces were introduced, it was rather obvious to move these registers to the other end of the memory bus.

Scumbria
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