Connect with us

JFET as unijunction transistor?

Discussion in 'Electronic Components' started by Salmon Egg, Oct 11, 2006.

Scroll to continue with content
  1. Salmon Egg

    Salmon Egg Guest

    It strikes me that a JFET, junction field effect transistor, has the same
    basic structure as a unijunction transistor. Has anyone here tried using a
    JFET as a unijunction transistor? How has it worked out? What is a good
    cheap type to get for the purpose?


    -- Fermez le Bush
  2. ian field

    ian field Guest

    With only 2 transistors (1 NPN & 1 PNP) you can simulate a programmable
    unijunction transistor (PUT) - simply connect the base of each transistor to
    the collector of the other, the emitters are the anode and cathode.
    Technically since you have access to both C/B joins the device you have
    created is a silicon controlled switch (SCS) you can regard this as a
    thyristor with an anode gate as well as a cathode gate - and if you ignore
    the cathode gate its a PUT.
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day