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<DIV><FONT face=Arial size=2>Hello everyone.. as you might know by now
i've been heavily modifing the adv-bass circuit.. so currently, ive
got it running off of 5v, and got the digital pots all working..
Although, i'm having a few problems with noise.. </FONT></DIV>
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<DIV><FONT face=Arial size=2>First.. At the final output stage, I am
getting noise, although not before it.. This sounds like it could be
digital, or it could just be a really low SN ratio.. So it's getting
into the summing matrix somehow.. I've changed this to just a
regular non-inverting summing amp.. which seems to me to be
ok.. Any clues? </FONT></DIV>
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<DIV><FONT face=Arial size=2>Also, I'm using the oscillator design from
the LM158 Datasheet (Same setup as the DS-7 Clone).. And i'm getting
a small bit of the square wave into the signa.. whats up with
that?! i'm tinking it has something to do with the virtual ground
setup.. but i'm not sure.. Anyone?
:-)</FONT></DIV>
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<DIV><FONT face=Arial size=2>Also, I can hear clicks when i change a digital
pot.. i'm thinking this is simply because it's stepped, but they seem rather
loud.. what can i do about that? </FONT></DIV>
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<DIV><FONT face=Arial size=2>And while we're on this subject.. what
precautions should I take in layout, construction to help curb these problems?
I'm thinking of construction the Analog and Digital section on seperate boards
and interconnecting.. Would def be easier on me as far as working on it..
anyway.. any input would be awesome! </FONT></DIV>
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