JFET Animation

How A JFET Works  Watch it work with an interactive diagram Using the Animation Start by clicking and dragging up, either of the handles on the VGS or VDS voltage sliders. This applies appropriate voltages to the JFET. Watch the "What´s Happening" box for information about the transistor´s operation as you adjust the VGS and VDS sliders. The VDS control changes the voltage across the drain and source, which sets up a voltage gradient...

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Field Effect Transistors

JFETs (Junction Field Effect Transistors) Although there are lots of confusing names for field effect transistors (FETs) there are basically two main types: 1. The reverse biased PN junction types, the JFET or Junction FET, (also called the JUGFET or Junction Unipolar Gate FET). 2. The insulated gate FET devices (IGFET). All FETs can be called UNIPOLAR devices because the charge carriers that carry the current through the device are all of the...

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Transistors

Introduction Transistors make our electronics world go ‘round. They’re critical as a control source in just about every modern circuit. Sometimes you see them, but more-often-than-not they’re hidden deep within the die of an integrated circuit. In this tutorial we’ll introduce you to the basics of the most common transistor around: the bi-polar junction transistor (BJT). In small, discrete quantities, transistors can be used to create...

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Transistor history

Who Invented the Transistor? On reading my recent @CHM blog “Who invented the diode?” CHM senior curator Dag Spicer pointed me to a fascinating scholarly treatise, “Singletons and Multiples in Scientific Discovery: A Chapter in the Sociology of Science,” that describes how multiple independent discoveries of scientific phenomena are the norm rather than the exception. The author, Robert K. Merton, traces this understanding back to Elizabethan...

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