Can you draw the two transistor model of a Silicon Controlled Rectifier and explain how it gets forward conductive with gate pulse?

Question

Accepted Answer

The two transistor model of a Silicon Controlled Rectifier consists of an NPN and PNP transistor connected in a feedback loop.

The NPN transistor is connected in series with the PNP transistor, forming a regenerative feedback loop.
When a gate pulse is applied, it triggers the NPN transistor to turn on, which in turn triggers the PNP transistor to turn on.
This regenerative process continues until the SCR is in forward conductive state.
The gate pulse must be of sufficient amplitude and duration to trigger both transistors into conduction.

Accepted Answer

After drawing the two transistor model of P-N-P-N  SCR, with the help of transistor equation and 1-B1B2 it was proved how it becomes forward conductive with gate pulse.

Can you draw the two transistor model of a Silicon Controlled Rectifier and explain how it gets forward conductive with gate pulse?

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