Hi,
I'm looking into how guitar distortion pedals work and came up with the attached circuit. Assuming the guitar output is around 1 to 2 volts the signal needs a little bit of amplification from U1. The mosfets clip the signal. U3 buffers the signal because otherwise the filter at U2 will load the mosfets too much. Actually that's pure conjecture, but without the buffer there is no more or very little distortion. So that's what the circuit tries to do. I would probably use a TL074 but LTSpice doesnt have it. The input amplifier is inverting for no particular reason because I don't know when you would use one or the other.
Is the simple voltage divider an acceptable way of replacing a split supply or are there better ways?
To me it looks like the filter is not working at all. Instead it just raises the noise floor. I get the same result with a simple passive RC filter. Is this how filters work or am I doing it wrong?
As always I'm also interested in comments about thing I didn't think to ask.
I'm looking into how guitar distortion pedals work and came up with the attached circuit. Assuming the guitar output is around 1 to 2 volts the signal needs a little bit of amplification from U1. The mosfets clip the signal. U3 buffers the signal because otherwise the filter at U2 will load the mosfets too much. Actually that's pure conjecture, but without the buffer there is no more or very little distortion. So that's what the circuit tries to do. I would probably use a TL074 but LTSpice doesnt have it. The input amplifier is inverting for no particular reason because I don't know when you would use one or the other.
Is the simple voltage divider an acceptable way of replacing a split supply or are there better ways?
To me it looks like the filter is not working at all. Instead it just raises the noise floor. I get the same result with a simple passive RC filter. Is this how filters work or am I doing it wrong?
As always I'm also interested in comments about thing I didn't think to ask.
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