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Power Amplifier Circuit using IC 741 and MOSFET

Last Updated on November 17, 2024 by Swagatam 9 Comments

741 power amplifier circuit

In this post we study a power amplifier design configured using an ordinary IC 741 and a couple of MOSFETs. An operational amplifier’s output power such as from an IC 741 can be typically enhanced when a complementary emitter follower transistor is coupled at its output. The same could also generally be accomplished using a […]

Filed Under: Audio and Amplifier Projects

Simple Hum Filter Circuit for Amplifiers

Last Updated on May 5, 2022 by Swagatam Leave a Comment

hum filter graph

The following post discusses a simple hum filter circuit which can be installed between an audio input source and a power amplifier, so that any possible mains hum frequency within the audio signal is blocked and only the clean audio frequency is allowed to go through. Introduction As the name suggests, hum noise is in […]

Filed Under: Audio and Amplifier Projects

Types of Power Amplifier Classes Explained in Simple Words

Last Updated on November 25, 2023 by Swagatam 6 Comments

class A amplifier

In this post I am going to explain power amplifiers and their classification according to their output electrical characters and application. We will be exploring amplifier classes: A, B, AB, C, D, E, F, G, H, I, S and T briefly and yes, that’s a lot of amplifier types that are available in today’s electrical […]

Filed Under: Audio and Amplifier Projects

Build this Subwoofer Amplifier Circuit [Mini Ground-Shaker]

Last Updated on November 18, 2023 by Swagatam 15 Comments

subwoofer circuit mini ground shaker

A subwoofer amplifier is basically a power amplifier designed to filter and extract the low frequency content from the input audio signal and amplify it to the desired levels. This allows a sound reproduction that is enhanced with deeper bass, generating a concert hall like, or an immersive theater like sound effects. By: Sania D’souza […]

Filed Under: Audio and Amplifier Projects

Dummy Load Circuit for Testing Power Supplies and Amplifiers

Last Updated on December 3, 2024 by Swagatam 34 Comments

dummy load circuit

In the following post I have explained two straightforward dummy load circuits: the first one can be used for testing high current power supplies, and the second design can be used for testing large power amplifiers. Suppose you have a 10 amp power supply and you want to confirm the 10 amp output through some […]

Filed Under: Power Supply Circuits

Simple 10 Watt Amplifier Circuits using Transistors

Last Updated on September 13, 2023 by Swagatam 30 Comments

simplest 10 watt amplifier circuit

In this post I will comprehensively explain 3 easy to build 10 watt power amplifier circuits, which can be built using discrete parts, such as resistors, transistors, and MOSFETs. The MOSFETs used in these designs are the ordinary IRF540 and IRF9540, that are easily avail;able in the market and are quite inexpensive. True Complementary 10 […]

Filed Under: Audio and Amplifier Projects

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