Don't forget, the pot is in parallel with the 22k resistor (from +IN to Ground).
I was assuming that it was isolated by the input cap.
Nuuk said:I was assuming that it was isolated by the input cap.
If you use the input cap, yes.
Not everybody uses it.
The input cap will only protect from DC from the source.
With NI, I would rather use the Ci cap. and have 2~5mv DC-offset.
With NI, I would rather use the Ci cap. and have 2~5mv DC-offset.
But I guess you would rather go with inverted anyway!
Nuuk said:But I guess you would rather go with inverted anyway!
Yes.
22uf is fine if you use 1k for Ri.
If 680 ohms, go for 33uf.
Bypass with 0.1~0.22uf poly.
Yes, I tried with and without that cap.
With the cap I have 4mv on one channel, 5mv on the other one.
Without the cap, I don't remember, it was long ago...
But it was much higher than this.
I used 33uf + 0.15uf poly.
If 680 ohms, go for 33uf.
Bypass with 0.1~0.22uf poly.
Yes, I tried with and without that cap.
With the cap I have 4mv on one channel, 5mv on the other one.
Without the cap, I don't remember, it was long ago...
But it was much higher than this.
I used 33uf + 0.15uf poly.
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