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Old 28th July 2010, 11:51 AM   #1
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Default Matching jfet at what voltage?

There are a number of articles suggesting matching jfets, usually at 10V. Yet, if my circuit works at, say for example, 20V, should I adjust the voltage of the matching circuit to 20V?
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Old 28th July 2010, 01:53 PM   #2
lineup is offline lineup  Sweden
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Yes, I would use 20 Volt.
Matching at 10 Volt would most probable be good enough,
but I like to match at the level devices should work.

When matching high power transistors, it is not as easy
to setup a situation with lots of power and heat.
But for small signal JFET and BJT this is less of a problem.
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Old 28th July 2010, 02:23 PM   #3
AndrewT is online now AndrewT  Scotland
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jFETs may not be at their best with 20Vds

I agree test/measure/match devices for the operating conditions of the application. Vds, Id, Tj/Tc,
regards Andrew T.
Sent from my desktop computer using a keyboard
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Old 29th July 2010, 11:57 AM   #4
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Thank you for the input.
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