What do you mean by depletion capacitance?
The P, N regions (electrodes) and depletion region (dielectric medium) allows the storage of charge in electric field. This ability of storing the charge is nothing but capacitance which in fact is termed in PN junction diode as junction capacitance or transition capacitance or depletion capacitance.
What is depletion capacitance of diode?
The depletion layer occurs in the pn junction of the diode when the voltage is applied in the reverse direction, and the thickness varies in proportion to the reverse voltage. Therefore, as the reverse voltage applied increases, the capacitance decreases.
What is depletion capacitance of pn junction?
Depletion Capacitance: Depletion capacitance is due to the storage of charges in reverse bias junction, which acts like parallel plate capacitance with the forward voltage. In the forward the depletion width decreases which increases depletion capacitance. It is less than diffusion capacitance in the forward bias mode.
What is diffusion and depletion capacitance?
(a) The difference between the depletion capacitance and the diffusion capacitance is that the depletion capacitance is formed due to the stored depletion charge in the semiconductor and the diffusion capacitance is due to the stored mobile carriers. Thus, there is a notable increase in the diffusion capacitance.
Is a diode a capacitor?
Key Difference: A diode is a type of electrical device that allows current to move through it in only one direction. A diode is a lossy passive electronic component, whereas a capacitor is a non-lossy passive electronic component.
What’s the difference between a diode and a capacitor?
A diode only allows current to pass through it in one direction. A capacitor, in the context you’ve described, acts as a low impedance path to GND for high frequency signals. So a diode protects current from going in an unintended direction whereas a capacitor resists voltage (across it’s plates) changing quickly.