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8th October 2009, 03:18 PM
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#12 |
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diyAudio Member
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TimS, temperature of Q1 Q9(and other pairs) will be different becouse Q9 dissipate less power then Q9 so the voltage at the input stage will be different from zero (20-40mv), so it should cascode Q1, such as I did in this old design http://diyaudio.org.ua/blog.php?u=2&b=6
In addition, the discrete output for the DS DACs will be a bad idea because it would occupy too much space on the PCB and therefore catch too much interference. 1794 Offset removes simply by adding 2.4k resistors from -15v power supply to 1794 outputs.
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