July 2010
Intermediate to advanced
900 pages
40h 1m
English
Content preview from Memory Systems
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CHAPTER 29
Power and Leakage
Power dissipation has become a top priority for today’s microprocessors. Previously a concern mainly for mobile devices, it has now become extremely important for general-purpose and even high-performance microprocessors, especially with the recent industry emphasis on processor “Performance-per-Watt.”
The power dissipated by typical modern circuits can be broken up into three main categories: dynamic or switching power, short circuit power, and leakage power. Dynamic power is due to the charging and discharging parasitic capacitance of transistors during logic transitions. This power is typically expressed in a simplified form:
(EQ 29.1)
where α is the average transition probability, Ctot is the total load capacitance ...
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