Uploaded December 2025 | Updated September 2026, 2 weeks ago

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Current Regulator diodes, also known as Current Limiting diodes, are really JFET devices that provide a constant current for a variety of applications. My videos on JFET current sources, and the basics of JFET devices may be handy background videos for you:
JFET current sources:
youtu.be/XJadPFYWglQ
JFET Basics:
youtu.be/oambDFa0Pr8

Several applications are shown - including linear ramp generation, capacitor measurement, current mirrors, relaxation oscillator and differential amplifier gain stabilization.

One of the applications I show uses an emitter-coupled differential pair amplifier. Here is my video on this circuit:
youtu.be/mejPNuPAHBY

Here are links to various manufacturers data and application pages for these devices:
microchip.com/en-us/search?q=Current-Regulator-Diode
my.centralsemi.com/paraSearch/parametricSearch_v1_1.php?task=bldPartTable2&PGroup=10&subGroup=50
centralsemi.com/files/manager/Engineering/Whitepapers/Current-Limiting-Diodes-current-regulation-solution.pdf
semitec-global.com/products/#tab34
semitec-global.com/uploads/2022/01/P22-23-CRD.pdf
linearsystems.com/currentregulatingdiodes
diotec.com/en/productlist/C.html
interfet.com/current-regulator-diodes

Notes from this video:
qsl.net/w2aew/youtube/CurrentRegulatorDiodes.pdf