Category: Lectures & Presentations
-

Regions of operations in BJT, leakage current, Lecture-XVII.
In our last two lectures (find’em here) we discussed in all detail the bipolar transistors and some of their characteristics in various configurations. There we briefly mentioned the BJT operate in various regions such as the active, cut-off and the saturation region. Today we will discuss that aspect a little more into our wit.
-

Bipolar Junction Transistors (BJT), Lecture-XV and XVI.
Today we will discuss another line of application of the pn semiconductor diodes: the so called bipolar junction transistors or BJT in short. There are two ways in which pn junction diodes can be joined together sharing a common P or N terminal. This produces 3 layer, 2 junction, 3 terminal devices. Such devices are…
-

Photo-diodes, lecture-XIV.
In our last lecture we discussed the concept and working of a particular type of diode which gets an immense application in solid state lighting technology in today’s world: the light emitting diode or the LED in short. There we saw how its capable of converting the electrical energy into optical energy. There is yet…
-

The Light Emitting Diodes, Lecture-XIII.
We have been discussing a lot about what are diodes, their characteristics and their application in the electrical and electronics industry. You must have heard about the durable and power efficient LED bulbs. Do you know they are made from diodes? YES. Semiconductors: they are ubiquitous. Today we will discuss about the light emitting diodes.…
-

Zener diode and voltage regulation, Lecture-XII.
Today we will discuss the Zener diode. Zener diodes get applications in various facets of electronics and electrical circuits. But we will focus on the most basic application of the same in voltage regulation. In our lecture-VII we discussed the current-voltage (IV) characteristics of the diodes, under forward and reverse bias, in detail. Lets recapitulate.…