Differential Day of Depletion

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Gonna try to build this and perhaps have some fundamental principles become aware 

Here we go (shamelessly plagiarised)

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We're off to a good start

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Which means things should go downhill quickly 

Why go downhill when you can jump 🦘 off a cliff ?  So here goes

-im guessing that ok yes it's gonna be a differential amplifier so it seems kind of silly (to me) to input signal to one side then (maybe) input on the other side and (possibly) see it inverted

Which is cool I presume when you are trying to amplify a difference to monitor two different signals but why have a differential amplifier in something like a guitar amplifier where there is ONE signal

Idk maybe they compare different stages to keep them in line it's probably complicated 


Hmm time to look at some amplifier schematics that employ such configurations 

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Moving right along I assembled this circuit and remembered Miss Wolfen has a new favorite spot

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Oh well on with the show

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The was an abundance of ample amplification available (I had it backwards measuring output on the left side is inverted)
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Then when I took Vo on the other side it was in phase

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Since I don't know anything I figured there would be NO output from the non-input side


Hopefully some things will start clicking if I take a look at some actual guitar amp schematics

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Ok wow
I had repeatedly read that it amplifies the DIFFERENCE and it wasn't sinking in.

So I got to thinking about it and wrote it down

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Then went back to my library and WHOOMP there it is

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more specifically

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So the question is "dude where's my 200% ?!?!"

Maybe I should have measured at the Vcc 


 Nm I actually have a million questions how the heck can a circuit subtract a signal