hi all,
i have been playing with a digital system for awhile now and have always had the problem of distortion due to no ac coupling at the input to my system.
today i got around to adding an ac coupling circuit to my circuit and the outcome sounds even worse than it did with no coupling. The noise is terrible.
I used the following circuit as an ac couple. I was aware the resistors may introduce noise but not this much. The noise overtakes the audio. However the small amount of audio that can be heard is no longer distorted.
I used a 1uF tant - was this a bad choice? i also used 10k resistors for the divider. Should they be higher?
If anyone has any suggestions how to remove the noise that would be great.
p.s the audio is fed into an A2D converter.
thanks
https://www.electro-tech-online.com/attachments/adcbias-jpg.17457/
i have been playing with a digital system for awhile now and have always had the problem of distortion due to no ac coupling at the input to my system.
today i got around to adding an ac coupling circuit to my circuit and the outcome sounds even worse than it did with no coupling. The noise is terrible.
I used the following circuit as an ac couple. I was aware the resistors may introduce noise but not this much. The noise overtakes the audio. However the small amount of audio that can be heard is no longer distorted.
I used a 1uF tant - was this a bad choice? i also used 10k resistors for the divider. Should they be higher?
If anyone has any suggestions how to remove the noise that would be great.
p.s the audio is fed into an A2D converter.
thanks
https://www.electro-tech-online.com/attachments/adcbias-jpg.17457/
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