The common emitter class-A amplifier is specifically engineered to generate a significant output voltage swing even when it is fed with a relatively minuscule input signal voltage that might only be a few millivolts. These amplifiers are primarily utilized as what we call “small signal amplifiers” a concept we explored in our earlier tutorials. Now […]
Working
Autotransformer Working and Calculations Explained
An autotransformer is not like the traditional voltage transformer. Normally a voltage transformer has two distinct windings. These windings are called the primary and the secondary. But with an autotransformer things are a bit different because it only has one single winding that actually does the job of both the primary and the secondary. Now […]
Electrical Transformer Working: Explained with Formulas
In this tutorial about transformers I will explain the basics in simple terms. As we know transformers can work without any moving parts inside and it is mainly used to change voltage levels so that we can transfer energy from one circuit to another through electromagnetic induction. We use alternating current (AC) in our homes […]
Darlington Transistor Working Explained with Calculations
In this post you will learn about this amazing BJT device called the Darlington Transistor. It was named after this genius engineer, Sidney Darlington, who came up with the idea. Basically it is like a special combo of two regular NPN or PNP bipolar junction transistors (BJTs) that are hooked up in a clever way. […]
Colpitts Oscillator Working, Explained with Calculations
Compared to the Hartley oscillator that we looked at in the last lesson, the Colpitts oscillator represents a very different way of designing tuned tank circuits. Similar to the Hartley oscillator which creates a sinusoidal output waveform by implementing an LC resonance sub-circuit between the collector and base of a single-stage transistor (BJT) amplifier, the […]
Norton’s Theorem: Working and Calculations Explained
Nortons Theorem, like Thevenin’s Theorem, offers a technique for streamlining complex circuits. It enables us to swap out complicated circuits with much simpler equivalents that just require one resistor and one source of current or voltage. This equivalent circuit is made up of, In basic terms, Norton’s Theorem reduces a complicated network of wires, resistors, […]