ehydra wrote:
I wonder because ALL of the shown circuits in his pdf are AC-coupled.
It is maybe possible to servo-loop with OpAmps but surely not worth
the effort.
Useful too as a Scope FET-probe.
Not really the gain inaccuracy is somewhat excessive.
One can do much better with the right circuit.
The AC coupling between input and output stages isnt actually necessary
if the output stage is biased appropriately.
A higher supply voltage also helps.
- Henry
Bruce
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