Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
I was looking around for a low Vbe transistor to use as a switch. Germaniums had a low Vbe but are hard to come by now. I'd rather not have to use an OPA comparator, any suggestions?
Well, it's a bit of an experiment, but I want to use a transistor to act as a current limit for a P Fet. The P FET Rds on is around .17 ohm, I'd like to limit the current to around 2 amps without adding more series resistance. So a .34 Vbe is too low for silicon transistor switching.
you're kind of doing this backwards, since reducing the current through the FET (by reducing the gate drive) INCREASES Vds. if your current limiter is not the FET, then it might work. you can use an op amp to sense Vds across the FET.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.