Zener diode nptel pdf

By passing a small current through the diode from a voltage source, via a suitable current limiting resistor r s, the zener diode will conduct sufficient current to maintain a voltage drop of vout. Chitralekha mahanta, department of electronics and communication engineering,iit guwahati. Zener diodes can be used to produce a stabilised voltage output with low ripple under varying load current conditions. When a zener diode is reversed biased, theres a different voltage drop. Lecture series on electronics for analog signal processing i by prof. Zener diode in may applications, operation in the reverse breakdown region is highly desirable. Working of the zener diode is similar to a pn junction diode in forward biased condition, but the uniqueness lies in the fact that it can also conduct when it is connected in reverse bias above its threshold breakdown voltage. Radhakrishna rao, department of electrical engineering,iit madras. Diode circuits operating in the reverse breakdown region. Lecture 10 zener regulator and voltage regulator youtube.

The symbol for the zener diode or break down diode is shown on the circuit. In the last lecture, we had commented that a normal diode which is not allowed to go into the breakdown region, a normal diode. The zener diode working principles and its various. Zener diodes are normal pn junction diodes operating in a reverse biased condition. In the last class, we saw that the diode can be used in the breakdown region as a zener diode and it can be primarily giving you secondary power sources called. Electrical characteristics tamb 25 c, unless otherwise specified part number zener voltage range 1 test current reverse leakage dynamic resistance f 1 khz surge current 3 regulator 2. It could be with a voltage source corresponding to vz which is the beak down voltage and a series resistance rz. Now these are the characteristics i v characteristics of a what we call zener diode. Easily share your publications and get them in front of issuus.