Patent ID: 7088131

Claim:
System for gating power from global terrain to a voltage island while controlling leakage and managing transient power supply noise, comprising: a global terrain; a voltage island; a global voltage source; a disable signal source; said voltage island including a field effect transistor (FET) power gate; a first connection to said global voltage source; a second connection to said disable signal source; an island voltage net for supplying voltage to devices on said island; a power gate control circuit responsive to said disable signal source for generating a test signal for selectively turning OFF said FET power gate as said disable signal source goes to a logical ‘1’, and for turning ON said FET power gate as said disable source goes to a logical ‘0’; said FET power gate responsive to said disable signal source being OFF for connecting said island voltage net to said global voltage source; a turn ON finisher circuit responsive to said disable signal transitioning to ON and to said test signal for holding said power gate solidly ON; and a turn OFF finisher circuit responsive to said disable signal transitioning to OFF and to said test signal for holding said power gate solidly OFF.