Ideal diode is characterised by:

PN Junction Diode

• A junction diode is a two-terminal semiconductor device that allows current to flow in only one direction.
• It is formed by joining a p-type semiconductor with an n-type semiconductor, creating a junction between them. The behavior of a junction diode depends on the forward voltage applied across it.
• When a forward voltage is applied to a junction diode, most carriers (electrons in the n-region and holes in the p-region) are pushed toward the junction. This movement of carriers allows current to flow through the diode.

Characteristics of an ideal diode:

• Zero forward biased resistance
• Infinite reverse biased resistance
• Zero average AC resistance
• Zero knee voltage
• Zero Junction Capacitance