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Old 7th November 2012, 08:34 AM   #51
roender is offline roender  Romania
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SE analog output at 2Vrms (0dB digital), THD 20kHz
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Old 8th November 2012, 04:56 PM   #52
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I get -59 dB THD20k at 2Vrms output voltage which is about 20 dB worse than you get. I have tried the design with both your values for the 4V version, and also with my values. You vales give me only 3,6Vrms (balanced, 1.8Vrms single ended) using 16 mAACp-p signal input.

Not sure what the discrepancy is caused by.Might be the models.

Did you even consider making a DC coupled version by foloding down the entire schematic and making a complementary version?


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SE analog output at 2Vrms (0dB digital), THD 20kHz
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Old 8th January 2013, 10:47 AM   #53
roender is offline roender  Romania
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Yes, I had done that but doesn't sound the same ... is more digital than analogic.
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Old 24th March 2015, 02:04 PM   #54
CFT is offline CFT  United States
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I understand your latest output stage has evolved into the one below.
ESS Sabre Reference DAC (8-channel)

So you now prefer it in voltage mode with higher output that gets filtered before going to a unity gain buffer while previously you had it in a sort of forced current mode then to a microphone preamp...

Could you describe the sonic differences? Is the filtering very important?
And would it be even neater to implement a common mode filter going into the buffers? Thanks roender.
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