The behavior of PN junction is different for reverse saturation current and forward bias voltage when the temperature is increased. Let's study the behavior of PN junction with examples.
Q) A Silicon PN junction at a temperature of 20 degree celsius has a reverse saturation current of 10pA. The reverse saturation current at 40 degree celsius for the same bias is approximately
Ans : 40 pA. Reverse saturation current doubles for every 10 degree rise in temperature
At 20 degree celsius-->10pA
At 30 degree celsius --->20pA
At 40 degree celsius --->40 pA.
Q) A Silicon PN junction biased with a constant at room temperature. When the temperature is increased by 10 degree celsius, the forward bias voltage across the junction decreases by?
Ans : Decreases by 25mV
Q) A Silicon PN junction at a temperature of 20 degree celsius has a reverse saturation current of 10pA. The reverse saturation current at 40 degree celsius for the same bias is approximately
Ans : 40 pA. Reverse saturation current doubles for every 10 degree rise in temperature
At 20 degree celsius-->10pA
At 30 degree celsius --->20pA
At 40 degree celsius --->40 pA.
Q) A Silicon PN junction biased with a constant at room temperature. When the temperature is increased by 10 degree celsius, the forward bias voltage across the junction decreases by?
Ans : Decreases by 25mV
For every degree rise in temperature, the voltage decreases by 2.5mV.
For 10 degree rise in temperature ---> 2.5mV*10=> Voltage decrease by 25mV
No comments:
Post a Comment