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

To: John Walliker who wrote (33934)	11/4/1999 5:39:00 PM
From: Tony Viola	Read Replies (2) \| Respond to of 93625

John, OK, the BIDI thing again, I keep forgetting. When a DRDRAM chip is transmitting it sees two transmission lines, one going towards the controller, one going away from it to the terminator. So it sees 14 ohms. The signal going towards the controller gets reflected at the open circuit end. At that point there is a superposition of the original signal and the reflected signal momentarily which doubles the voltage. As the voltage had been halved by sharing the drive current between two directions of the transmission line and doubled again by the reflection at the open end the result is the same signal level at the receiving circuits of the controller as that which is received by the memory chips from the controller. It's a good thing nobody has to pass a quiz on this before buying the stock. I know there have been stranger technologies in the annals of electronics history, but I'd be hard pressed to think of one used in the digital world. I'll give it a rest now. Tony