A single event transient immune oscillator for DC-DC converter controllers

This paper presents a radiation harden oscillator for DC-DC converter controllers. In order to mitigate the single event transient, a novel synchronous RS flip-flop is proposed. Redundancy flip-flop blocks are connected in cycle. Therefore, upset node voltage can be corrected by other nodes. Gate size is carefully designed to improve the critical charge. Three modular redundancy is also utilized. Moreover, radiation harden layout technology is applied to degrade the influence of total ionizing dose effect. The simulated results demonstrate that the proposed circuit can work well with linear energy transient of about 85 Mev· cm 2 /mg.