[time-nuts] Switching transistors, current sources, nonidealties and noise
attila at kinali.ch
Sat Jul 2 13:00:24 EDT 2016
On Fri, 1 Jul 2016 12:28:44 -0400
Bob Camp <kb8tq at n1k.org> wrote:
> Real cascode circuits can be built with RF transistors. They also can be simulated.
> Simulating them with the “standard” models is a PIA. The issue is that the inductance
> of the package is not de-embedded from the test “socket” as carefully as it might be.
> There is also the somewhat non-intuitive need to stick a low value resistor in the base.
> Done properly, they are very reproducible and reasonably insensitive to load.
Thanks! That resistor in the base did the trick!
Am I right in the assumption that the resistor gives the transistor
some negative feedback and thus prevents it from oscillating?
Any simple idea will be worded in the most complicated way.
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