Bias won't affect bandwidth (while operating within it's Class A envelope) just Vds affects bandwidth.
Bias just affects transconductance.
Not sure whether you want to know transconductance at 250mA or bandwidth at 250mA
Of course this is in the context of zero feedback.
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Great, all the data in one thread. Btw, what is the generator output impedance ?
Bias will influence transconductance but not bandwidth when operated without feedback.
That is, I wouldn't expect to see differences in bandwidth changing the bias, in my current test setup. I will try it out of curiosity though just to see.
Increasing Vds generally improves bandwidth, as seen in the results.
Of course if it were used common source and you apply feedback, at that point transconductance will most certainly improve bandwidth, so both need to be considered depending on the application.
Edit: I will do transconductance vs bias later.
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3rd times the charm! I was thinking something, why not 2 pico 2, you`re 10% out of specs ??
Thanks a lot for your time and data, cheers.
I went back and checked the resistance at the gate, it was bloody 100 Ohms not 10 Ohms.
So 150 Ohms total assuming the function generator published data of 50 Ohms is accurate.
The new generator arrived so I will be running them again on my new toy.
