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fet buffer?

9Lives

Active Member
Oct 3, 2012
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This is not something in trying. It's more of a theory. A lil trick I use for lowering impedance in effect pedals and guitar amps is to use a unity gain, mosfet or jfet stages on the input.
The mosfet has infinitely high input Z so it would not need any sort of coupling on the gate.

Is this a possibility to get rid of one of those pesky broadband transformers? I have so many parts but that is one I have trouble getting a collection of.

Like I said. It's not something I'm trying to do. Just brain puking all over y'all.
 

Creating a high impedance input may not solve the transformer issue unless the only issue is impedance matching. If the inputs are balamced then a transformer is still required to convert from balanced to unbalanced in which case an opamp on the input is ideal and can be uswed both as a transformerless input and an impedance matcher. if all you require is a simple impedance transformation then what you are thinking about will work.
 

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