A method for triggering a high voltage solid state switch comprised of a
set of thyristors connected in series. Initiating switch turn-on requires
command triggering of only the lowest voltage thyristor, thereby
eliminating the need for expensive high voltage pulse transformers or
optically isolated triggers. Triggering of one thyristor causes a
redistribution of voltage across the switch, generating a current flowing
through the snubber circuit across each untriggered thyristor. This
current is coupled to the gate of each thyristor causing all of them to
turn on simultaneously. This results in an inexpensive method for
triggering a high voltage solid state switch.