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Understanding Input Impedance of a BJT Amplifier Circuit

March 5, 2025 by Admin-EF Leave a Comment

The Input Impedance ZIN, or what people call as the Input Resistance, is important thing when making transistor amplifier circuits. It helps us to tell what kind of amplifier it is by looking at input and output impedance and also power and current ratings. Now amplifier impedance value is very important for circuit analysis, especially […]

Filed Under: Amplifier Circuits Tagged With: Amplifier, BJT, Impedance, Input, Understanding

Summarizing Audio Amplifier Circuit Characteristics

February 24, 2025 by Admin-EF Leave a Comment

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 […]

Filed Under: Amplifier Circuits Tagged With: Amplifier, Audio, Characteristics, Summarizing

How to do Transistor Biasing Correctly

February 20, 2025 by Admin-EF Leave a Comment

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 […]

Filed Under: Amplifier Circuits Tagged With: Biasing, Correctly, Transistor

Why We Use Emitter Resistor in a BJT Amplifier Circuit

February 16, 2025 by Admin-EF Leave a Comment

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 […]

Filed Under: Amplifier Circuits Tagged With: Amplifier, BJT, Emitter, Resistor

What is Crossover Distortion in Class-B Amplifier Circuits

February 12, 2025 by Admin-EF Leave a Comment

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 […]

Filed Under: Amplifier Circuits Tagged With: Amplifier, Circuits, Class, Crossover, Distortion

Class-B Amplifier Circuit Explained

February 11, 2025 by Admin-EF Leave a Comment

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. […]

Filed Under: Amplifier Circuits Tagged With: Amplifier, Class, Explained

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