So when we think about amplifiers we usually picture those audio amplifiers that we come across in our stereos, CD players and radios which we have set up in our homes. In this part where we are investigating amplifiers, we took a closer look at just one type of amplifier circuit, specifically the single bipolar […]
Amplifier
Why We Use Emitter Resistor in a BJT Amplifier Circuit
The goal of any BJT amplifier is to keep the DC biased input voltage steady and to make the AC signal bigger. To do this we use something called an “emitter resistance” that connects to the emitter part of a transistor. This helps the amplifier stay stable with its bias. The stability happens because the […]
What is Crossover Distortion in Class-B Amplifier Circuits
When we talk about distortion in an amplifier we are basically referring to how the output signal does not exactly match the original input signal it gets altered in some way. One particular type of distortion that affects amplifiers with a push-pull design is something known as crossover distortion. This happens specifically at the point […]
Class-B Amplifier Circuit Explained
Ok, in this post I will teach you regarding Class-B amplifiers and how it works. So if we want to make the full power efficiency of that old Class A amplifier a whole lot better by cutting down on the power that just gets wasted as heat, we can totally redesign the power amplifier circuit. […]
Class-A Amplifier Working Explained using Formulas
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 […]
Understanding Distortion in Amplifier Circuits
In order for a signal amplifier to do its job properly and make sure that the output signal does not get distorted in any way it is really important to have some kind of DC Bias applied to its Base or Gate terminal. You see, a DC bias is necessary because it allows the amplifier […]