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Sources of power dissipation in digital CMOS circuits 1. Switching power (Dynamic Power)
2. Short circuit power
3. Leakage power
AvgPower = P(switching) + P(short-circuit) + P(leakage)
Switching Power
* Consists of Activity factor(alpha)
* The load capacitance
* Voltage Swing through which the capacitance
* power supply voltage Vdd
Short Circuit power
* Current flows between Vdd and Ground (Isc) . Flow of current when both P (pullup) and N (pull down ) network are on simultaneously during an output transition
Leakage Power
* Current due to leakage through reverse biased PN junctions and sub-threshold conduction of MOSFET's
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