Consider a p-n junction diode having the characteristic i= i 0 (e eV/kT – 1) where i 0 = 20 μA. The diode is operated at T = 300 K. (a) Find the current through the diode when a voltage of 300 mV is applied across it in forward bias. (b) At what voltage does the current double?

Question

Philoid · Accepted Answer

Given, i₀ =20 μA =20×10^-6 A
And temperature, T=300K

a) Forward biasing voltage, V=300mV
According to the current diode equation,

•

b) Now the current has doubled, i.e. i = 4 A

According to the current diode equation,

• i = i₀ (e^eV/kT – 1)

•

Taking log both sides,

•

• V= 318mV

Consider a p-n junction diode having the characteristic i= i0(eeV/kT – 1) where i0 = 20 μA. The diode is operated at T = 300 K.(a) Find the current through the diode when a voltage of 300 mV is applied across it in forward bias.(b) At what voltage does the current double?

Consider a p-n junction diode having the characteristic i= i₀(e^eV/kT – 1) where i₀ = 20 μA. The diode is operated at T = 300 K.
(a) Find the current through the diode when a voltage of 300 mV is applied across it in forward bias.

(b) At what voltage does the current double?