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Thu Mar 10 20:27:10 EST 2011

DC amp

For 9V battery-powered circuits it might be simplest to use a buffered
100k/100k voltage divider as the GND connection for inputs and outputs.

It might introduce offset for high gain apps, but it does away with
capacitors and biasing issues.

Trouble is that you can't use the TRS jack trick to power on the
circuit.



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