All items tagged with audio op-amps (13)

Scott A. Wurcer – An Audio Legend Left Us

March 22, 2024 by Jan Didden

Scott A. Wurcer – An Audio Legend Left Us

Scott Wurcer from Cambridge Mass passed away on March 18, at the age of 74. Scott was one of those people who made a technical contribution to audio that can hardly be overstated. His analog IC designs for Analog Devices are legendary for their creative design and extremely high performance. Scott loved a good life, and I shared many exquisite meals and great wines with him. I will miss him.

Book Review: Burkhard Vogel’s Slopes and Levels. Spice Models to Simulate Vintage Op-Amp Noise

June 21, 2023 by Marcel van de Gevel

Book Review: Burkhard Vogel’s Slopes and Levels. Spice Models to Simulate Vintage Op-Amp Noise

Interested in accurately simulating the noise of op-amp circuits? Audio electronics expert Burkhard Vogel wrote a book that addresses this relevant topic for any audio circuit designer that doesn't want to rely just on manufacturers own models. In this review, Marcel van de Gevel explored the full book after he read Vogel's introduction, explaining that some manufacturer-supplied simulation models are way off.

audioXpress May 2023. Tubes, Amplifiers, and Audio Electronics!

April 11, 2023 by audioXpress Staff

audioXpress May 2023. Tubes, Amplifiers, and Audio Electronics!

In this Glass Audio special issue, Menno van der Veen brings us his latest Vanderveen TRANS-PP80 Valve Amplifier, Tom Perazella remakes a famous (Z)OTL amplifier with 300Bs, and Peter Dieleman debunks recurring myths in tube circuit designs. Stuart Yaniger reviews the Hypex NCORE NCx500 amplifier module, while Burkhard Vogel expands his article on Vintage Op-Amp Noise Simulations, and Bruce E. Gillingham concludes its unique MB1 Monoblock Power Amplifier with Precision Bias Control.

Hearables, Headphones Testing, Audio Electronics, and More in audioXpress April 2023

March 10, 2023 by audioXpress Staff

Hearables, Headphones Testing, Audio Electronics, and More in audioXpress April 2023

Want to understand what's ahead in the most revolutionary audio product category of the 21st century? Read the State of the Hearables Industry Market Update. And for product developers and manufacturers, there's also a Headphones Test and Measurement report. Burkhard Vogel discusses op-amp noise in simulated models, Bruce E. Gillingham offers a complete monoblock power amplifier project, and René Christensen writes about acoustic topology optimization. And so much more....

audioXpress March 2023 Test and Measurement Issue Now Available!

February 10, 2023 by audioXpress Staff

audioXpress March 2023 Test and Measurement Issue Now Available!

audioXpress March 2023 offers an overview of the latest solutions and trends in audio measurement. Stuart Yaniger reviews the new Echo AIO modular audio test system, Philipp P. Klose writes about measurements in automotive audio environments, and Steve Temme shares his knowledge on audio testing in the production line. René Christensen explores Lumped Element Modeling of Transducers, Chuck Hansen expands the topic of power transformer losses, and Ethan Winer concludes his two-part article about Modern PCB Design Practices.

Creative Launches Sound Blaster X1 USB DAC and Headphone Amplifier

August 5, 2022 by audioXpress Staff

Creative Launches Sound Blaster X1 USB DAC and Headphone Amplifier

Creative Technology launched the Sound Blaster X1, an updated version of its SXFI AMP introduced in 2018, offering an improved USB DAC and headphone amplifier in the same exact compact form-factor. The Sound Blaster X1 combines the company's Sound Blaster Acoustic Engine with its Super X-Fi Headphone Holography technology, one of the earliest attempts at a binaural spatial audio engine. The difference is that the Sound Blaster X1 is now targeted for all computer audio needs.

Searching for a Unicorn Part 2: Generating a Good Signal Source

January 27, 2021 by Brian Lowe

Searching for a Unicorn Part 2: Generating a Good Signal Source

In this second article, Brian Lowe (Belleson LLC) continues his search for the Unicorn of "Measuring Voltage Regulator Ripple Rejection," this time focusing on the test fixtures. Testing a voltage regulator with exceptionally good performance requires an even more exceptional signal source and measurement setup to measure sub-microVolt ripple across a wide frequency range. Complementing the final article, Jan Didden, offers an informative sidebar about super regulators. This article was originally published in audioXpress, June 2019.

The Audio Technologies That Matter More Than Ever in audioXpress February 2021

January 11, 2021 by audioXpress Staff

The Audio Technologies That Matter More Than Ever in audioXpress February 2021

audioXpress February 2021 explains why Microphones have gained Essential Status, and how microphones have a foundational contribution to voice front-ends. Erica Yorga details how Thousands of Virtual Microphones can solve audio conferencing challenges, and Mike Meechan explains how to design high-performance microphone preamplifiers. Brent Butterworth reviews the Widex Moment mRIC RD hearing aids to understand the differences and similarities in the critical sound experience. Michael Steffes explains how to increase the output current for an audio op-amp, and Andrew C. Russell details the X-Altra, a high-performance MC/MM phono equalizer DIY project. Now available in print and digital.

More Digital Signal Processing and Better Audio in audioXpress November 2020

October 9, 2020 by audioXpress Staff

More Digital Signal Processing and Better Audio in audioXpress November 2020

This audioXpress November 2020 edition explores the latest trends in digital signal processing (DSP) and how it applies to all audio applications, now increasing in power thanks to cutting-edge artificial intelligence running on devices. In this issue, you will also learn how to "Test and Optimize Strategies for Conference Terminal Equipment," "What to Measure for Quality Control of Audio Devices," and more about Automotive Audio Bus A2B. Stuart Yaniger reviews the latest Earthworks M23R Measurement Microphone, and you can read articles about acoustics, audio electronics and the best in DIY audio from our monthly columnists.

Communications and Residential Installation in audioXpress October 2020

September 11, 2020 by audioXpress Staff

Communications and Residential Installation in audioXpress October 2020

The October 2020 edition of audioXpress is now available online and in print. This is one of the most feature-rich issues we have ever published, with a residential installation Market Update, a new article series about Analog Devices A2B, two articles about communications, including an article by Manfred Lutzky (Fraunhofer IIS) on codecs, plus a great review of the GeerFab Audio D.BOB Digital Breakout Box by Gary Galo. Plus three DIY-oriented articles and our regular expert columns on acoustics, tubes, and audio electronics.

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