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Politics : Formerly About Advanced Micro Devices

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To: Petz who wrote (68451)	8/11/1999 6:32:00 PM
From: Bill Jackson	Read Replies (1) of 1579039

Petz. Re; peak power etc. I ahd thought that a clocked device like a single gate draws the max current when it changes state as it is clocked. No state change=no current. Now when you get 22 million transistors do they all dance at to the same tune?, by that I mean do they all clock at the same time? so you get a huge current pulse at a 600 Mhz rate?, or are there so many things in different states, moving stuff around etc that this is all averaged out to an average current. A DC current of 42 Amps at 1.6 volts does indeed equal 67.2 watts. If you have a saw tooth with flat sides you end up with a RMS value of 50%(unlike the sinewave of .707) because the voltage is either there or not and the sides are so flat they are fleeting. Hell even sloped ramps are 50% so it does not matter. SInce each gate is a 50% RMS situation does that mean the RMS current is 21 Amps, leading to an RMS wattage of 33.6? Bill

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