When a p-n junction is reverse biased, the current becomes almost constant at 25 μA. When it is forward biased at 200 mV, a current of 75 μA is obtained. Find the magnitude of diffusion current when the diode is

Question

Philoid · Accepted Answer

It is given that drift current is 25 μA and biasing current is 75 μA at 200 mV forward biasing.

A. We know that when the diode is unbiased,

Diffusion current = drift current = 25μA

B. When the diode is reverse biased, diffusion current = 0

C. When the diode is forward biased at 200mV,

Diffusion current - Drift current = Forward biasing current

Diffusion current – 25 μA = 75 μA

Diffusion current = (75+25) μA

Diffusion current =100 μA

When a p-n junction is reverse biased, the current becomes almost constant at 25 μA. When it is forward biased at 200 mV, a current of 75 μA is obtained. Find the magnitude of diffusion current when the diode isA. unbiasedB. reverse biased at 200 mV andC. forward biased at 200 mV.

When a p-n junction is reverse biased, the current becomes almost constant at 25 μA. When it is forward biased at 200 mV, a current of 75 μA is obtained. Find the magnitude of diffusion current when the diode is
A. unbiased

B. reverse biased at 200 mV and

C. forward biased at 200 mV.