All items tagged with audio amplifiers (141)

Voice for True Wireless Earbuds, GaN, and More Exciting Audio Frontiers in audioXpress April 2022

March 11, 2022 by audioXpress Staff

Voice for True Wireless Earbuds, GaN, and More Exciting Audio Frontiers in audioXpress April 2022

The April 2022 issue of audioXpress offers an overview of voice for true wireless stereo earbuds with contributed articles from Knowles and Fluent.ai. Stuart Yaniger reviews the possibilities with GaN amplifiers, and Steve Temme explains the evolution of Rub & Buzz measurements and the latest perceptual algorithms. Ethan Winer designs a sample & hold circuit for a guitar-controlled, all-analog synthesizer project, Richard Honeycutt explores the meaning of “frequency response” as applied to rooms, and Mark Driedger explains why and how to test tubes.

Focusrite plc Acquires DSP and Amplifier Experts Linea Research Holdings

March 10, 2022 by Joao Martins

Focusrite plc Acquires DSP and Amplifier Experts Linea Research Holdings

Focusrite plc, the British music and audio conglomerate company that also owns Martin Audio among other brands - and recently created Optimal Audio - announced the acquisition of Linea Research Holdings Ltd, a UK-based designer and manufacturer of professional audio equipment. The acquisition allows Focusrite to add a very strong audio amplifier and signal processing company to the group, while the founders of Linea Research join the fast growing Focusrite Group.

New Higher Power MERUS MA5332MS Class D Audio Amplifier Multichip Module Now Available

February 21, 2022 by audioXpress Staff

New Higher Power MERUS MA5332MS Class D Audio Amplifier Multichip Module Now Available

Unlocking the potential of its best-in-class power MOSFET technology, Infineon Technologies introduced the MERUS 2-channel, analog input, class D audio amplifier multichip module (MCM) MA5332MS, adding a higher power and smaller footprint device to its MERUS technology family. It is a powerful upgrade to its predecessor, offering the same or even higher output power than monolithic alternatives, without a heatsink and 50 percent less footprint.

Audio Electronics - Cascodes, Folded Cascodes, and Current Mirrors (Part 3)

February 2, 2022 by Morty Tarr

Audio Electronics - Cascodes, Folded Cascodes, and Current Mirrors (Part 3)

For those readers following the fascinating article series by Morty Tarr on "Cascodes, Folded Cascodes, and Current Mirrors," this final article in the series contains an additional section with important aspects of amplifier design. In the first two parts of this article series, Tarr discussed the technical merits of cascodes and related circuits. This useful addendum covers a simple test circuit for matching FET devices, the fascinating story of the Blowtorch Line Stage design, and additional notes on inverting and non-inverting amplifier stages and integrators. This article was originally published in audioXpress, December 2021.

Audio Electronics: Cascodes, Folded Cascodes, and Current Mirrors (Part 2)

January 26, 2022 by Morty Tarr

Audio Electronics: Cascodes, Folded Cascodes, and Current Mirrors (Part 2)

In Part 1 of this three-part article about circuit topologies that are used to provide specific functions for an amplifier design, the author discussed cascodes and folded cascodes. In this Part 2, he focuses on current mirrors and line stages. As the author writes, “As designers, we have many devices to choose from. Some devices are ideally suited to certain tasks. Other tasks require performance that is difficult to achieve. While many excellent devices exist today, ideal devices do not exist, except maybe in Spice simulations.” This article was originally published in audioXpress, October 2021.

Audio Electronics: Cascodes, Folded Cascodes, and Current Mirrors (Part 1)

January 19, 2022 by Morty Tarr

Audio Electronics: Cascodes, Folded Cascodes, and Current Mirrors (Part 1)

For this audio electronics article, Morty Tarr wrote a fascinating exploration of circuit topologies that are used to provide specific functions for an amplifier design. Cascodes, folded cascodes, and current mirrors are some of these topologies, intended to improve the performance of the devices, but which also add complications. In the first of a three-part series, the author discusses cascodes and folded cascodes, useful to improve high-frequency response and device linearity.

GaN Systems and Axign Demonstrate New 500W Class-D Reference Audio Amplifier

January 7, 2022 by Joao Martins

GaN Systems and Axign Demonstrate New 500W Class-D Reference Audio Amplifier

GaN Systems, the leading GaN power semiconductor specialist and audio technology innovator Axign, debuted a new groundbreaking GaN-based 500W Class-D audio amplifier. This reference design merges best-in-class technologies, including GaN Systems’ GaN power transistors and Axign’s Class-D controller, enabling companies to create unique audio systems that are smaller, sleeker, more efficient, more powerful, and provide better audio quality than previous generations.

GaN Systems Updates Reference Design for Class-D Audio Amplifiers

January 7, 2022 by Joao Martins

GaN Systems Updates Reference Design for Class-D Audio Amplifiers

GaN Systems, the GaN (gallium nitride) power transistor specialist, announced an updated version of its Class-D audio amplifier evaluation kit, allowing evaluation for high-efficiency audio reference designs. Evolving from the original evaluation kit introduced in 2020, GaN Systems released the GeN2 amplifier and companion switched-mode power supply reference design today, shrinking the size and increasing its capabilities for Class-D audio designs.

Fresh From the Bench: Parasound Halo JC 5 Stereo Power Amplifier - The Measurements

October 27, 2021 by Stuart Yaniger

Fresh From the Bench: Parasound Halo JC 5 Stereo Power Amplifier - The Measurements

Oliver A. Masciarotte was looking for an amplifier that he could respect without emptying his bank account. Richard Schram offered to send the Parasound JC 5, his company’s largest stereo power amplifier for evaluation. Anticipating the fun of enjoying the pleasures of this John Curl design, Oliver accepted the challenge, and Stuart Yaniger tested the JC 5 to confirm the amplifier’s merits with actual measurements. This article was originally published in audioXpress, September 2021.

Fresh From the Bench: Parasound Halo JC 5 Stereo Power Amplifier - Traditional Goodness

October 27, 2021 by Oliver A.Masciarotte

Fresh From the Bench: Parasound Halo JC 5 Stereo Power Amplifier - Traditional Goodness

Oliver Masciarotte was looking for an amplifier that he could respect without emptying his bank account. Richard Schram offered to send the Parasound JC 5, his company’s largest stereo power amplifier for evaluation. Anticipating the fun of enjoying the pleasures of this John Curl design, Oliver accepted the challenge, and Stuart Yaniger tested the JC 5 to confirm the amplifier’s merits with actual measurements. This article was originally published in audioXpress, September 2021.

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