[sdiy] Single supply use of the SSM2164

[Matthew Smith]

Quoth Olivier Gillet at 21/08/11 19:22...
...
> In the example given in the "Single supply" section of the datasheet,
> the mid-rail is obtained through a resistor network + buffer, but I am
> concerned that this might not entirely eliminate voltage variations
> that might be present in the +9V rail.

Due to the issues of cost and availability of suitable power supplies 
(everything being aimed at digital nowadays,) I'm about to experiment 
with a TLE2426 driving a BUF634. This should give an accurate 250mA of 
virtual ground, as far as I can see.

Planning to experiment with a 24V SMPS, using this to provide the 
virtual ground. I can't see how SMPS, working up in the MHz range 
nowadays, could upset audio frequency stuff.


-- 
Matthew Smith

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