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A Zener diode doesn't allow almost any current to flow below a certain voltage. Above this voltage (the breakdown voltage), the amount of current that can flow is almost unlimited; meaning that the device acts as an "open" for lower voltages, and as a "short" for higher voltages.
Wiki User
∙ 11y ago
Wiki User
∙ 8y agoThe reverse bias voltage that "breaks down" the junction and causes it to conduct backwards.
For the breakdown voltage of a specific diode you will have to read the datasheet.
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Why tunnel diode are used in negative resistance region?
because that the tunnel diode is a standard pn junction diode in many respect except its highly doped pn junction so it has some characteristics in the negative resistance region another that its a standard diode
Different between schottky diode and zener diode?
pn junction diode conducts current in one directions where as the zener diode conducts in both the directions. large current flow damage the PN junction diode but zener diode conducts eventhough there is a large current........
In4001 diode what is IN in it?
It means that the semi conductor have only one pn junction
What is the dependence of reverse saturation current in a P-N diode on applied voltage and temperature?
In a PN junction diode, the reverse current is due to the diffusive flow of minority electrons from the p-side to the n-side and the minority holes from the n-side to the p-side. Hence IS, reverse saturation current depends on the diffusion coefficient of electrons and holes. The minority carriers are thermally generated so the reverse saturation current is almost unaffected by the reverse bias but is highly sensitive to temperature changes. so , as the temperature increases the density of minority charge carriers increases creating a slight increase in the amount of IC.so, the inference is reverse current is directly proportional to temperatureIn the reverse biased condition the PN diode is least dependent on voltage till certain limit called breakdown voltage, till that voltage the increase in V is not actually increasing the current it is just increasing the heat at the junction which in turn raises the temperature and so the minority charge carriers.But if the voltage increases the breakdown voltage the pn junction is lost and all the holes and electrons will start acting like charge carriers , such avalanche of charge carriers increases the current sharply to several hundred times. This phenomena is called as zener or avalanche breakdownso if applied voltage less than breakdown voltageno significant change in reverse current(only due to minority charge carriers)and if applied voltage greater than breakdown voltagethe pn junction break and current increases sharply (both due to minority and majority charge carriers)
What is the use of PN diode?
there are many uses. one major use i remember is in rectification i.e convert ac to dc For switch operation
Is it pn junction diode used as voltage regulator?
zener diode
What are specifications of pn junction diode?
This can vary significantly from diode to diode (especially the reverse recovery time and peak reverse breakdown voltage), so always consult the datasheet.
What is the effect of temperature on barrier voltage in a pn junction diode?
ginago
What is a barrier voltage?
The voltage across a forward-biased PN junction in a semiconductor diode or transistor.
How do you xxplain the zener shunt regulator?
zener diode is a special type of pn junction diode that work in breakdown region . There are two types of brekdowns in zener i.e avlanche breakdown and zener breakdown depending on the doping concentration. A zener diode in an on state can be considered as a voltage source ,equal to its zener voltage n hence act as an voltage regulator
What is the difference between p n junction and zener diode?
The difference between the pn-junction diode and the zener diode is that the pn-junction diode is used for rectification while the zener diode is used for rectification and stabilization. Also, the zener diode can function in the breakdown region while the pn-juntion diode can not function in that regime.
What are the limiting values of a PN junction Diode?
A: heat And PIV(Peak Inverse Voltage) or so called Peak Reverse Voltage is limit the diode characteristics.
What is zener break down voltage?
The point in the forward operating region of the characteristic curve where conduction starts to increase rapidly is called Knee voltage of a PN Junction Diode.The breakdown voltage of a diode is the minimum reverse voltage to make the diode conduct in reverse.(or) Breakdown voltage is a parameter of a diode that defines the largest reverse voltage that can be applied without causing an exponential increase in the current in the diode.-- Dinakar
What is the need of resistor in the experiment of pN junction diode?
The resistor limits current so you can measure voltage across the diode. When you forward bias and saturate a junction, the voltage across it will be constant (0.7 in silicon, for example).
Is the pn junction diode is a bipolar or unipolar?
diode is unipolar
What is the opposite of diode?
another name for diode is "pn" junction.
PN junction diode made of silicon is the value of voltage depends exponentially on the current through the diode.?
No, the voltage across a silicon PN junction diode does not depend exponentially on the current through the diode. The relationship between voltage and current in a PN junction diode is described by the diode equation, which is an exponential relationship between current and the voltage across the diode. However, this relationship depends on factors such as the temperature and doping levels of the diode, in addition to the material used.
