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Old 21st Apr 2021, 9:48 pm   #13
radioman
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Location: Ayr, Ayrshire, UK.
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Default Re: Tektronix P6201 FET Probe repair

Quote:
Originally Posted by G0HZU_JMR View Post
The VNA tests do indicate a subtle lack of symmetry in the die, there seems to be less shunt capacitance at the drain part of the die compared to the source. I think the drain and source sit over the top of the gate so maybe there is a tiny bit less drain area compared to the source.
This page from my Siliconix databook seems to confirm your hypothesis !

Andy
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