Latest Amplifiers Technical Articles

In this first part of a series of articles, we investigate the role of the op-amp’s gain-bandwidth product (GBP).

In this first part of a series of articles, we investigate the role of the op-amp’s gain-bandwidth product (GBP).

Learn about one of the only audio filter topologies out there, the Moog filter!

Learn about one of the only audio filter topologies out there, the Moog filter!

This article is an intuitive introduction to the statistical nature of noise and the basic calculations required to…

This article is an intuitive introduction to the statistical nature of noise and the basic calculations required to combine noise sources in a circuit.

What is filtering? Learn what resistor-capacitor (RC) low-pass filters are and where you can use them.

What is filtering? Learn what resistor-capacitor (RC) low-pass filters are and where you can use them.

This article presents Scilab code that allows you to generate I/Q, noise, and chirp signals from your PC’s headphone jack.

This article presents Scilab code that allows you to generate I/Q, noise, and chirp signals from your PC’s headphone jack.

This article discusses a technique in which frequency-domain subtraction is used to selectively suppress the noise…

This article discusses a technique in which frequency-domain subtraction is used to selectively suppress the noise components in an audio signal.

This article is an introduction to the complex topic of DSP-based reduction of noise in audio signals.

This article is an introduction to the complex topic of DSP-based reduction of noise in audio signals.

Learn how to build your own Class D power amplifier—one of the most efficient ways to listen to music.

Learn how to build your own Class D power amplifier—one of the most efficient ways to listen to music.

The Blomley amplifier was designed over forty years ago, is an alternative power amplifier design that suffers virtually…

The Blomley amplifier was designed over forty years ago, is an alternative power amplifier design that suffers virtually no distortion, and provides a sound which has the presence often lacking in conventional amplifiers.

This article, part of AAC’s Analog Circuit Collection, explores a handy circuit that can generate sustained sinusoidal…

This article, part of AAC’s Analog Circuit Collection, explores a handy circuit that can generate sustained sinusoidal oscillations.

In this article, we’ll look at a fairly straightforward circuit that enables a robot or other device to detect sound.

In this article, we’ll look at a fairly straightforward circuit that enables a robot or other device to detect sound.

Learn about the basics of audio electronics, which convert sound signals into electrical signals, process these…

Learn about the basics of audio electronics, which convert sound signals into electrical signals, process these electrical signals, and convert them back into sound.

Harmonic distortion can be introduced to audio amplifiers from many sources but reduced to levels below the threshold of…

Harmonic distortion can be introduced to audio amplifiers from many sources but reduced to levels below the threshold of human hearing.

THD of an audio system can be easily measured, but because the ultimate output of an audio system is a sound for humans…

THD of an audio system can be easily measured, but because the ultimate output of an audio system is a sound for humans to hear, human perception plays a role in determining what to do about THD.

Nowhere to hide presents this holiday season? No problem! This alarm will sound anytime a loved one tries to get a sneak…

Nowhere to hide presents this holiday season? No problem! This alarm will sound anytime a loved one tries to get a sneak peek at his or her surprise.

In part 2 of the LED saber project, we'll assemble the power and audio systems.

In part 2 of the LED saber project, we'll assemble the power and audio systems.

This article describes the bridge-amplifier configuration and explains why it’s especially handy when you don’t have…

This article describes the bridge-amplifier configuration and explains why it’s especially handy when you don’t have a negative voltage supply.

In this article, we will look at two variations on the basic BJT current-buffering circuit.

In this article, we will look at two variations on the basic BJT current-buffering circuit.

Use negative feedback to increase your amplifier’s signal-to-noise ratio, reduce its nonlinear distortion, and improve…

Use negative feedback to increase your amplifier’s signal-to-noise ratio, reduce its nonlinear distortion, and improve its input- and output-impedance characteristics.