A delay line appropriate for use in a POR circuit or other integrated
circuit in a space environment combines three separate circuit techniques
to improve performance without unnecessarily increasing circuit area or
adding to manufacturing costs when compared to a simple inverter delay
line. The delay line of the present invention uses the selective
placement of capacitors throughout the delay line, one-sided current
starving, and the incorporation of one-sided Schmitt trigger circuits.
Performance of the delay line is substantially immune to SEGR events
("Single Event Gate Rupture") and SET events ("Single Event Transients").
Spurious signals produced by SEGR and SET events are quickly and
substantially attenuated.