Question: What Is VI Characteristics Of Zener Diode?

What is VI characteristics of diode?

I -represents the current through the diode.

So V-I characteristics of a diode means plotting the graph for voltage across the diode versus the current through the diode.

Voltage on the x -axis and current on the y -axis .

There are two cases forward bias and reverse bias .

V -represents voltage across the diode..

What is VI characteristics of pn junction diode?

The VI characteristics of PN junction diode in forwarding bias are nonlinear, that is, not a straight line. This nonlinear characteristic illustrates that during the operation of the N junction, the resistance is not constant. The slope of the PN junction diode in forwarding bias shows the resistance is very low.

Is Zener diode a rectifier?

Zener diodes are mostly used for regulating voltages. However, yes, they can be used for rectifiers. Above it’s threshold voltage(Zener voltage), the Zener diode allows reverse flow of current.

What is Zener breakdown voltage?

When reverse biased voltage applied to the zener diode reaches zener voltage, it starts allowing large amount of electric current. At this point, a small increase in reverse voltage will rapidly increases the electric current. Because of this sudden rise in electric current, breakdown occurs called zener breakdown.

What are the applications of diode?

The application areas of diodes include communication systems as limiters, clippers, gates; computer systems as logic gates, clampers; power supply systems as rectifiers and inverters; television systems as phase detectors, limiters, clampers; radar circuits as gain control circuits, parameter amplifiers, etc.

What are the types of diodes?

Different Types of DiodesDifferent Types of Diodes.Backward Diode.Gunn Diode.Laser Diode.Light Emitting Diode.Photodiode.PIN Diode.PN Junction Diode.More items…

What is triac and its characteristics?

A Triac is defined as a three terminal AC switch which is different from the other silicon controlled rectifiers in the sense that it can conduct in both the directions that is whether the applied gate signal is positive or negative, it will conduct. Thus, this device can be used for AC systems as a switch.

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 a VI graph?

Both the IV and VI graph shows the relation between potential V, and current I. In VI graph, we take potential at y-axis and current at x-axis. … In IV graph, Current is at y-axis and potential is at x-axis. The reciprocal of the slope of IV graph shows the resistance.

What is cut in voltage in Zener diode?

What is cut-in-voltage ? Ans: The forward voltage at which the current through the junction starts increasing rapidly, is called the knee voltage or cut-in voltage. It is generally 0.6v for a Silicon diode.

What is Zener diode draw its IV characteristics?

Zener Diode I-V Characteristics The Zener Diode is used in its “reverse bias” or reverse breakdown mode, i.e. the diodes anode connects to the negative supply. … A zener diode will continue to regulate its voltage until the diodes holding current falls below the minimum IZ(min) value in the reverse breakdown region.

What do you mean by Zener breakdown?

The Zener breakdown can be defined as the flow of electrons across the p kind material barrier of the valence band to the evenly filled n-type material conduction band.

What is knee voltage?

In the forward region of the graph, the voltage at which the current starts to increase quickly is called the knee voltage of the diode. Study of a diode circuit usually comes down to determining if the diode voltage is higher or lower than the knee voltage.

What are zener diodes used for?

Zener diodes are widely used as voltage references and as shunt regulators to regulate the voltage across small circuits. When connected in parallel with a variable voltage source so that it is reverse biased, a Zener diode conducts when the voltage reaches the diode’s reverse breakdown voltage.

What is Zener effect and Avalanche effect?

The Zener effect is distinct from avalanche breakdown. … The avalanche breakdown occurs in lightly doped junctions, which produce a wider depletion region. Temperature increase in the junction increases the contribution of the Zener effect to breakdown, and decreases the contribution of the avalanche effect.