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Technology Stocks : Advanced Micro Devices - Moderated (AMD) -- Ignore unavailable to you. Want to Upgrade?

To: Petz who wrote (21388)	12/3/2000 2:37:34 AM
From: Ali Chen	Read Replies (1) \| Respond to of 275872

Petz, <..Intel has developed a new method.> It is just a sloppy electrical engineering. Eventually they started to realize that when a chip consumes 30A and has little operational margins on Vcc, every milli-Ohm of package and board traces count. FYI, Intel's design guidance for Vcc power supply calls for _local_ feedback for buck converter. AMD engineers were more educated and use four-wire power connection to K7: high current Vcc and ground planes, and two dedicated low-current feedback wires, both from Vcc and ground points on the chip. In this way the power supply delivers a voltage that is automatically compensated for parasitic power plane resistance, and the Vcc is always accurate no matter what. I am surprised that Intel engineers are not familiar with basics of power supply applications. Regards, - Ali