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Old 8th April 2002, 11:33 AM   #1
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Default Seperate analogue stage after DAC chip

Please see/find my enclosed file for the schematic.

I want to build my own analog stage for my minidisc player (which I use as a DAC.)
The DAC has 2 outputs per channel, therefore I want to have a differential buffer and then a gain stage.

I am no EE and barely know how these opamps work so I copy designs and put them together

Will my design work? Any thoughts on the design are appreciated (Except op-amp fetishes) It uses the TLE2027AI opamp. The only thing I don't want to change with this design
is the opamp. Cause I have a couple of them lying around :-)

Regards,
Bas Horneman.
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Old 8th April 2002, 04:27 PM   #2
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For starters......

The inverting input is a virtual ground. The non-inverting is 10K. You would need to put 10K in series with the inverting input to make it the same.

I assume your DAC is a voltage-out type since it has 2 outputs.

Jocko
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Old 8th April 2002, 04:55 PM   #3
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If I understand correctly I should add a 10k resistor to the - input of the first opamp?

I suppose it is a voltage output from what I've read (Sony MDS-JE510.)

By the way should I tap the outputs from IC 301 or IC 307?

Regards,
Bas
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Old 8th April 2002, 09:41 PM   #4
sonnya is offline sonnya  Denmark
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Try looking at this. Much easy can you not do a balanced to singleended conversion.

Sonny
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Old 8th April 2002, 11:37 PM   #5
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Default Thank Sonnya...might try it after this project.

So I can compare the two with each other...

Regards,
Bas
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