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27th March 2006, 02:28 PM
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diyAudio Member
Join Date: Dec 2003
Location: Oslo, Norway
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DC blocking feedback
In the I/V converter of my next DAC project there is quite a bit of gain, so any offset from the DAC chip itself will be amplified.
Do you know of good DC blocking feedback circuits? This is what I'm thinking about to make it quasi-balanced: PCM1704, single-ended I/V converter from OPA627 in inverting mode, two output filters, one from an inverting opamp feedback, the other from a non-inverting opamp. Each of these two will have a separate DC blocking feedback. I'm really interested if this has been done before on the forum. Searching for "dc blocking" gave a lot of results but nothing very informative. Cheers, Børge |
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