Why zener diode acts as a reference element in the voltage regulator circuit?

Answer 1

It has a very sharp reverse breakdown voltage curve and is not damaged by the reverse current, as some normal diodes might be.

Answer 2

The zener diode behaves as a voltage regulator because, in the reverse bias condition, it has a relatively flat voltage to current curve. That means that the voltage across the diode will be relatively constant even if the current through it varies slightly. In order to achieve stable operation, you should operate in the normal "expected" current range. You get that from the specifications.

Answer 3

A: Once a zener breakdown in the reverse direction the voltage across remains the same. As input voltage increases or decrease the voltage remain the same. Therefore this property can be exploited to ascertain that a particular circuit will have to this to work with

Answer 4

A zener diode has a relatively steep voltage to current curve in the reverse bias mode at its reverse bias breakdown voltage. By placing a resistor in series with the zener diode, with both of them across a relatively stable voltage source, at the nominal bias current, typically 75 ma depending on the diode, you get a very stable voltage reference. You can use this directly, so long as you consider current, voltage, and power over the range of expected load, or you can follow that up with a class c emitter follower, or even an op-amp regulated emitter follower. It all depends on your power requirements.

Answer 5

A zener diode is a special kind of diode, which permits current to flow in the forward direction as normal, but it will also allow current to flow in the reverse direction when the voltage is above a certain value. This break over vlotage is the zener voltage which the diode is named after. See Related Links below.

Answer 6

zener diode has sharp reverse voltage so when it is connected parallel in reverse bais condition with supply voltage it holds contant voltage at large variation in supply.

Answer 7

application of zener diode as reference element

Answer 8

legal an specfic zener diode.

Answer 9

Same as above