Patent ID: 7215135

Claim:
An apparatus for hardening logic circuitry against a Single-Event-Effect condition and for providing immunity to an overshoot and undershoot condition, the apparatus comprising: an undershoot-blocking module that is configured to be coupled to an overshoot-insensitive node of the logic circuitry, wherein the undershoot-blocking module is operable to (i) receive from a first node of the logic circuitry a first signal event having a undershoot condition impressed thereon, and (ii) block the first signal event from passing to the overshoot-insensitive node, thereby preventing further propagation of the undershoot condition; and a overshoot-blocking module that is configured to be coupled to an undershoot-insensitive node of the logic circuitry, wherein the overshoot-blocking module is operable to (i) receive from the first node a second signal event having a overshoot condition impressed thereon, and (ii) block the second signal event from passing to the undershoot-insensitive node, thereby preventing further propagation of the overshoot condition.