If the substrate doping concentration increase, or temperature increases, how w

If the substrate doping concentration increase, or
temperature increases, how will Vt change? it increase or
decrease?

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If the substrate doping concentration increase, or temperature increases, how will Vt change? it in..

If the Substrate doping concentration is increased, the number of randomly moving electrons that need to be aligned are increased which means threshold voltage is increased.
And the threshold voltage decreases with increase in temperature.

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