[TCML] SISG DOPE?

[bartb]

Yes. The SIDAC's conduct as the sum of the series string. Once the 
Sidac's fire and turn on the IGBT's, the IGBT path effectively shorts 
the Sidac path causing the Sidac's to turn off. Thus, their ready to 
start again when the IGBT's turn off. In the links Terry provided is 
probably the topology paper which gives a clear understanding of the 
circuit.

Take care,
Bart

Ed Phillips wrote:
> Thanks - haven't read much of my mail today [this one attracted me 
> because of the subject] so haven't gotten around to Terry's note but 
> I'll look at it.  Am I correct in believing that the breakdown voltage 
> per stage is approximately the sum of the SIDAC voltages?
>
> Ed