All items tagged with MOSFET (38)

SVS Launches Flagship 17-Ultra R|Evolution Subwoofers with Digital Control

October 7, 2024 by Alfred Moody

SVS Launches Flagship 17-Ultra R|Evolution Subwoofers with Digital Control

SVS, a name that everyone immediately identifies with powerful subwoofers, launched its new flagship 17-Ultra R|Evolution subwoofer series. Previewed at CEDIA 2024 in Denver, the two new 17-Ultra subwoofer designs represent a ground-up design approach for the Ohio-based audio brand, including a custom 17" high-excursion woofer with dual voice coil windings, a digital processing stage, and full room correction optimization through a smartphone app.

Dissipation, Thermals, and Rds(on)

August 29, 2024 by Jan Didden

Dissipation, Thermals, and Rds(on)

This article explores the significance of the Rds(on) specification of a MOSFET in a linear voltage amplifier and implications on Thermal Design - dissipation, thermal resistances, and heatsinking. It may be of interest to put this in perspective and highlight the connection between these subjects.

Toshiba Develops SiC MOSFET with Embedded Schottky Barrier Diode that Delivers Low On-Resistance and High Reliability

December 9, 2022 by audioXpress Staff

Toshiba Develops SiC MOSFET with Embedded Schottky Barrier Diode that Delivers Low On-Resistance and High Reliability

Toshiba developed an SiC metal oxide semiconductor field effect transistor (MOSFET) that arranges embedded Schottky barrier diodes (SBD) in a check pattern to realize both low on-resistance and high reliability. Toshiba has confirmed that the design secures an approximately 20% reduction in on-resistance (RonA - the resistance value between the drain and source of a MOSFET during operation) against its current SiC MOSFET, with no loss of reliability.

Linear Systems Announces 2022 Small-Signal Discrete Semiconductor Data Book

April 13, 2022 by audioXpress Staff

Linear Systems Announces 2022 Small-Signal Discrete Semiconductor Data Book

Linear Integrated Systems, the world-class designer and manufacturer of precision, high-performance, small-signal discrete semiconductors, announced the release of its 2022 Small Signal Discrete Data Book. The Data Book provides all Linear Systems’ datasheets in one spot. The Table of Contents includes product category, part number and part description, so users can browse the entire product line with ease. There is also a dedicated section on packages, highlighting the latest package innovations and packing options.

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.

You Can DIY! The DH-220C MOSFET Power Amplifier - Part 2 Construction and Testing Instructions

December 15, 2021 by Bob Cordell and Rick Savas

You Can DIY! The DH-220C MOSFET Power Amplifier - Part 2 Construction and Testing Instructions

This reference DIY project details of an upgrade construction for the legendary Hafler DH-220 lateral MOSFET power amplifier, which can also be used to upgrade other Hafler models or even inspire new designs. The design is implemented on two PCBs, one as a drop-in replacement for the original Hafler circuit board and another board that consolidates all of the output stage wiring and components within the heatsink and under the main PCB. After the authors detailed the design and performance of the DH-220C upgrade amplifier, in this second part of the article, Bob Cordell and Rick Savas discuss the construction and testing. This article was originally published in audioXpress, August 2021.

You Can DIY! The DH-220C MOSFET Power Amplifier - Part 1 The Circuit

December 8, 2021 by Bob Cordell and Rick Savas

You Can DIY! The DH-220C MOSFET Power Amplifier - Part 1 The Circuit

This article offers the first serving of an amazing DIY project from amplifier experts Bob Cordell and Rick Savas with an upgrade for the legendary Hafler DH-220 lateral MOSFET power amplifier. The design is implemented on two PCBs, one as a drop-in replacement for the original Hafler circuit board and the other as a new board that consolidates all of the output stage wiring and components within the heatsink and under the main PCB. This article was originally published in audioXpress, July 2021

New Approaches to Speaker Optimization in audioXpress December 2021

November 11, 2021 by audioXpress Staff

New Approaches to Speaker Optimization in audioXpress December 2021

audioXpress December 2021 is now available. Learn how Room Correction and Speaker Calibration is influencing efforts towards the Self-Calibrating Loudspeaker, Dirac's take on Spatial Room Correction Technology, and how to Measure Directivity of In-Wall Loudspeakers. Richard Modafferi describes his unique crossover design build, Frans de Wit talks about DC Power Supplies, Morty Tarr discusses important aspects of amplifier design, and Michel Nieuwenhuizen offers an Arduino-based motor control for turntables. Start reading online or in print.

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