For a forward-biased junction diode in its exponential region, what happens to small-signal dynamic resistance when its DC operating current is reduced at fixed temperature?
higher
In the exponential region, rd ≈ ηVT/ID. With temperature and ideality factor fixed, reducing ID increases rd. The dynamic resistance becomes higher.
Important Questions from Diodes and Its Applications
Which of the following statements is FALSE about LED lamps?
A Zener diode is used in _______ for voltage regulation.
Which of the following diodes can be used as Voltage Regulator if used in reverse bias?
What is it called when a diode exceeds the reverse voltage and then it fails and passes more current in the reverse direction?
Determine the resonant frequency of an IMPATT diode having the following specifications:
Carrier drift velocity: 2 × 107 cm/s
Drift-region length: 5 μm
Maximum operating voltage: 100 V
Maximum operating current: 250 mA
Efficiency: 20%
Breakdown voltage: 90 V
