The Engineer

High-voltage AC/DC converters integrate 800V MOSFET with pulse-width modulation

Mouser Electronics is now stocking the VIPer01 high-voltage converters from STMicroelectronics (ST). Part of the VIPerPlus family of high-voltage converters based on ST’s Bipolar-CMOS-DMOS (BCD) ...
EDN

A guide to using FETs for voltage-controlled circuits, Part 4

See Part 1, Part 2, and Part 3 of this series. The previous FET circuits pertained to voltage-controlled signal amplitude circuits. That is, the input signal’s amplitude can be changed at the output ...
EDN

Envelope Tracking Modulator with quad power IC and FPGA control

Envelope tracking technology is a well-known method of improving the efficiency of RF amplifiers operating with rapidly varying signal amplitude. The voltage source in an envelope tracking system is ...
Machine Design

The ABCs (and 1-2-3s) of variable frequency drives

Variable frequency drives (or VFDs) are widely used throughout industry to provide adjustable speed control of ac motors. Although modern versions are relatively simple to install and operate, VFDs ...