PBS

Lesson 4

In this lesson, students build two circuits and explore how transistors function. When Bell Labs introduced the transistor in June of 1948, a spokesman proudly announced "This cylindrical object . . .
EDN

Designing fast, isolated microamp current sources: Part 1

In order to test and characterize optical front end circuits, a controllable, high bandwidth, microamp-level current source is needed. However, most optocouplers on the market have large CTR variation ...
inc42

What Is Are Gates? Here’s All You Need to Know

What Is A Semiconductor Gate? The gate electrode is a thin film of a conductive material deposited on top of an insulator layer in a transistor. The gate sits above a channel formed in the main body ...
EDN

Low Cost Dimmable LED Ballast Using the Valley Fill Current Shaping Circuit

This is a design idea of a low cost dimmable LED ballast employing the valley fill current shaping circuit. This design features Power Integrations LinkSwitch-TN LNK306PN. It meets ENERGY STAR SSL ...