Question

assuming a barrier potential of 0.7v at an ambient temperature of 25c, what is the barrier potential of a silicon diode when the junction temperature is 50c?at 10c​

Answer 1

Answer:

answer = 0.75V

Explanation:

The temperature coefficient of a semiconductor diode (including a transistor's base-emitter diode) is -2mV/ °C.

A change of temperature from 25 to100 is 75°. The voltage change is therefore 75 x -2mV. That's -0.15V

The junction voltage will be 0.7 - 0.15 = 0.55V

In the case of a change from 25 to 0C that's 25 x 2mV, or 50mV

The junction voltage will then be 0.7 + 0.05 = 0.75V