GaN Talk a blog dedicated to crushing silicon
Term: 窒化ガリウム
3 post(s) found

A 95%-Efficient 48 V-to-1 V/10 A VRM Hybrid Converter

A 95%-Efficient 48 V-to-1 V/10 A VRM Hybrid Converter
Oct 07 2018

Gab-Su Seo1,2, Ratul Das1, and Hanh-Phuc Le1
1Department of Electrical, Computer, and Energy Engineering, University of Colorado
2Power Systems Engineering Center, National Renewable Energy Laboratory, Colorado, U.S.A.

With drastically increasing demands for cloud computing and big data processing, the electric energy consumption of data centers in the U.S. is expected to reach 73 billion kWh by 2020 [1], which will account for approximately 10% of the U.S total electric energy consumption. A large portion of this consumption is caused by losses from inefficient power delivery architectures that require a lot of attention for improvements [2], [3].

Designing LiDAR and more into Autonomous E racing

Designing LiDAR and more into Autonomous E racing
Aug 27 2018

This post, authored by Steve Taranovich, Editor-in-Chief, Planet Analog was originally published August 10, 2018 on the Planet Analog website. Learn more about eGaN technology and EPC GaN solutions for LiDAR.

I have a pathological interest in the promotion of electric vehicles; Formula E racing is one of the most exciting venues for techies like myself. See some of my articles on Formula E in the links at the end of this blog.

What caught my eye recently was a ROBORACE video at a Formula E race track in Rome, Italy:

Gallium Nitride Brings Sound Quality and Efficiency to Class-D Audio

Gallium Nitride Brings Sound Quality and Efficiency to Class-D Audio
Oct 27 2016

Class-D audio amplifiers have traditionally been looked down upon by audiophiles, and in most cases, understandably so. Switching transistors for Class-D amplifiers have never had the right combination of performance parameters to produce an amplifier with sufficient open-loop linearity to satisfy the most critical listeners. This restricted the classical analog modulator Class-D systems to lower-power, lower-quality sound systems.

To accomplish the required headline marketing THD+N performance targets, Class-D amplifiers have had to resort to using large amounts of feedback to compensate for their poor open-loop performance. By definition, large amounts of feedback introduce transient intermodulation distortion (TIM), which introduces a ‘harshness’ that hides the warm subtleties and color of the music that were intended for the listening experience.