DYNAMIC SWITCHING CIRCUIT INCLUDING DELAY ELEMENT FOR COUNTERMEASURE AGAINST ALPHA PARTICLE AND COSMIC RAYS

摘要

PROBLEM TO BE SOLVED: To prevent an output error by connecting a delay element between an output node and a recharging transistor to increase recharging time to reduce the sensitivity of dynamic circuit to alpha particles and cosmic rays causing early discharge. SOLUTION: A delay element 134 is connected between the output node 132 and the recharging control input 123 of the recharging transistor 122. Thereby the element 134 increases time for recharging an active node 118 by the transistor 122. Thereby the sensitivity of the dynamic circuit 110 to alpha particles, cosmic rays and other particles generating causing early discharge is deteriorated to prevent the output error of the output node 132. In addition the delay element 134 introduces additional resistance to increase the capacitance of the output node 132 and a time constant generated between the output node 132 and the recharging control input 123. The recharging time of the transistor 122 is extended by the increase this time constant.