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If you want to keep a bipolar transistor running smoothly, it really comes down to getting the right balance of its base current, collector voltage, and collector current. So if we want to use a transistor as a linear amplifier, we have got to bias it properly. Biasing basically means setting it up so it […]

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 […]

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 […]

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. […]

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 […]

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 […]