What are the characteristics of pn junction?

What are the characteristics of pn junction?

V-I Characteristics of PN Junction Diode

• Zero bias.
• Forward bias.
• Reverse bias.

What is the ideal characteristics of pn junction diode?

The ideal diode has zero resistance for the forward bias polarity, and infinite resistance (conducts zero current) for the reverse voltage polarity; if connected in an alternating current circuit, the semiconductor diode acts as an electrical rectifier.

What is the PN junction and its properties?

A p-n junction diode is a basic semiconductor device that controls the flow of electric current in a circuit. It has a positive (p) side and a negative (n) side. To make a p-n junction diode, a different impurity is added to each side of a silicon semiconductor to change how many extra holes or electrons are present.

What is IV characteristics of pn junction?

The value of the forward current is dependent on the value of the forward voltage with a direct relationship between these two. This direct relationship is called the IV Characteristics of PN Junction.

What is a PN junction explain VI characteristics of a pn junction?

Volt-ampere (V-I) characteristics of a pn junction or semiconductor diode is the curve between voltage across the junction and the current through the circuit. Normally the voltage is taken along the x-axis and current along y-axis.

What is meant by VI characteristics?

V-I characteristics stand for voltage-current characteristics of an electrical component or device. Put simply; it is the graph between Voltage and Current obtained when current is measured through an electronic component as a voltage is applied across it.

What is diode and its characteristics?

A diode is simply a PN junction, but its applications are extensive in electronic circuits. Three important characteristics of a diode are, first of all, the forward voltage drop. Then there is the reverse breakdown voltage. Reverse voltage drop that will reverse current flow and in most cases destroy the diode.

What are characteristics of ideal diode?

Ideal Diode Characteristics

• Threshold Voltage. Ideal diodes do not have a threshold voltage.
• Forward Current. Ideal diodes include unlimited forward current when any forward voltage is applied across their terminals.
• Breakdown Voltage. Ideal diodes do not have a breakdown voltage.
• Reverse (leakage) Current.

What is VI characteristic?

What is the main function of PN junction?

A diode (PN junction) in an electrical circuit allows current to flow more easily in one direction than another. Forward biasing means putting a voltage across a diode that allows current to flow easily, while reverse biasing means putting a voltage across a diode in the opposite direction.

What are VI characteristics?

What is current voltage characteristics of a pn junction diode?

Increasing the forward bias voltage causes the forward current and the voltage across the diode to increase. Referring to the current-voltage characteristic curve for the diode, the forward current has a slight increase until the pn junction reaches 0.7 volts at the knee of the curve.

What are the V-I characteristics of a PN junction?

V-I Characteristics of A PN Junction In the forward bias, the operational region is in the first quadrant. The threshold voltage for Germanium is 0.3 V and for Silicon is 0.7 V. Beyond this threshold voltage, the graph goes upward in a non-linear manner. This graph is for the dynamic Resistance of the junction in the forward bias.

What are the characteristics of a PN junction diode?

Characteristics of PN junction diode is a graph between the voltage applied across its terminals and the current that flows through it.

When is no voltage applied across the p n junction?

When there is no voltage applied across the p n junction, the potential developed across the junction is 0.3 volts at 25 oC for germanium pn junction and 0.7 volts at 25 oC for silicon p n junction.

What happens when a PN junction breaks down?

At breakdown voltage, current increases rapidly for a small increase in voltage. A reverse voltage, at which PN junction breaks down with a sudden rise in reverse current is known as the breakdown voltage of the diode. The high reverse current may damage the junction.