Wednesday 9 November 2016

semiconductors - Can a thyristor be built from two transistors?


Supposedly, an SCR/thyristor is just a simple, four layer PNPN semiconductor.


If that's the case..


When a circuit calls for a SCR/thyristor, and there isn't one available, can it be substituted by (i.e. crafted from) two BJTs (or other discrete components, for that matter)?



Here are a couple of examples I had in mind; anode = blue, gate = green, cathode = orange: enter image description here enter image description here




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