Patent attributes
The present invention is to provide a latch-up resistant electrostatic discharge (ESD) protection circuit and method thereof, which comprises a clamping circuit being able to discharge when activated, a sustaining unit for directing electrostatic charge via said sustaining unit to said clamping circuit when activated and a sensing unit for activating said clamping circuit and said sustaining unit. When an ESD event, a signal noise or a power bounce is detected, said clamping circuit and said sensing unit is activated, said sustaining unit is activated to increase discharging ability of said clamping circuit, and then said sensing unit self resets after a period of time to deactivate said sustaining unit, thereby said clamping circuit is deactivated and a latch-up is prevented.
