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A: 6.2 volts for zeners are very sharp. Lower then that the knee is sloppy and above the sharpness decreases. A 3,2 v zener maybe nothings more then diodes in series, The sharpness of the knee is more pronounced into Vbe breakdown of transistors however the voltage cannot be predicted
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoA: ZENERS are nothing else then regular diode that have a very predictable reverse breakdown voltage of xx volts. This voltage can be used to limit the input voltage or regulate on it.
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What happens to zener current after the breakdown voltage is reached?
After breakdown voltage is reached in a zener diode the current increases drastically.
When current through a zener diode increases by a factor of 2 by what factor does the voltage across the zener diode increase?
If the zener diode is in zener breakdown the voltage across the zener diode remains constant regardless of current (for the ideal zener diode). Real zener diodes have parasitic resistance that causes the voltage across the zener diode to increase slightly with increased current, but due to temperature dependant variations in this parasitic resistance as well as temperature dependant variations in the zener breakdown voltage, this change in voltage in real zener diodes cannot be described by a simple linear factor.
How does the zener diode protect the meter?
The zener diode protects the meter by stabilizing the voltage when it goes in to the breakdown region.
In what region of their characteristic curve are zener diodes operated?
Zener diodes are normally operated in their reverse breakdown voltage curve.
What is the difference between rectifier diode and zener diode?
A: They are both diodes. The difference lies in the application. A rectifier is used to rectify AC current into pulsating current. The zener diode is used to regulate a voltage source to the zener voltage when connected in the reverse direction. ************************************************************** If you look at the characteristic curves of a rectifier diode and a zener diode, you will see that they are similar, but the reverse curve of the zener has a much sharper bend at what is called the "knee". It is at this point on the zener's curve at which it operates.
What happens to zener current after the breakdown voltage is reached?
After breakdown voltage is reached in a zener diode the current increases drastically.
Can zener diode used as rectifier?
Yes **************************************** Yes they can but there are pitfalls. A normal diode will have a high reverse breakdown voltage. A zener has a relatively low breakdown voltage (its "zener"voltage). If a zener diode is used as a rectifier it must have a zener voltage at least twice the peak of the applied a.c.
Does zener diode works after breakdown voltage?
Yes. The intended use of a zener diode is to be reverse biased at the breakdown voltage. In this mode, the zener has high slope in the current to voltage curve, making it a good choice for voltage regulation.
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 break down region of zener diode?
Zener breakdown is the phenomena wherein the Zener diode experiences reverse breakdown at a much lower voltage than a normal diode, which may breakdown in excess of 100 volts, depending on the type. This is useful because the Zener will hold the same voltage after breakdown, regardless of the input voltage, making them excellent for voltage controlled switches and references.
When current through a zener diode increases by a factor of 2 by what factor does the voltage across the zener diode increase?
If the zener diode is in zener breakdown the voltage across the zener diode remains constant regardless of current (for the ideal zener diode). Real zener diodes have parasitic resistance that causes the voltage across the zener diode to increase slightly with increased current, but due to temperature dependant variations in this parasitic resistance as well as temperature dependant variations in the zener breakdown voltage, this change in voltage in real zener diodes cannot be described by a simple linear factor.
What is the function of zener dioed?
The function of a zener diode is for it to act as a voltage regulator in the breakdown region.
Difference between avalanche zener and thermal breakdown?
Avalanche is when you surpass the negative bias voltage threshold and the zener breaks, thermal breakdown would be putting too much current or voltage across the zener and burning it out.
Operation of zener diode?
A: A zener is a diode that when connected in the reverse mode current direction it will breakdown to a predetermined voltage any further increasing voltage the breakdown will remain practically the same.
Why does voltage remain constant in the reverse breakdown region in a zener diode?
This space is for answering "http://wiki.answers.com/Q/Why_does_voltage_remain_constant_in_the_reverse_breakdown_region_in_a_zener_diode" Why does voltage remain constant in the reverse breakdown region in a zener diode?
Are diode forward and zener voltages the same?
A: Both diodes have the same curve in the forward direction however if the zener voltage is reverse it will breakdown at a particular voltage and remain conducting at the voltage. A regular diode will not do that the to voltage will fold back after breakdown to any voltage
How does the zener diode protect the meter?
The zener diode protects the meter by stabilizing the voltage when it goes in to the breakdown region.
