floating inductor simulation?
don at till.com
Wed Nov 29 17:48:16 CET 1995
Date: Wed, 29 Nov 95 10:50:00 PST
For an emulation of the Hammond Vibrato, I need a lot of Inductors
in the 500mH range.
You're one very busy guy!
I thought about building them with gyrators, but I don't have
the right circuit so far.
Now let me get this straight; relays are reasonable and inductors are
I know that simulating a *grounded* inductor is quite
easy - done it many times for EQ circuits with the simple
one-opamp circuit that has some parasitic effects.
Now for the *floating* inductors that I need, I only know
a circuit with 2 gyrators. It uses 4 opamps and many
resistors, and I wonder if there is another way to to it!
I wouldn't recommend using a gyrator. Instead I'd build little active
filter units for each stage of the chain that duplicate each LC
...No, wait a second, that's not good enough, there's important
interaction between the stages.
I have to think about this a little more.
(I know about that 4 opamp gyrator circuit, but I don't know of
anything simpler. Hmmm, maybe with OTAs?)
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