Creating A Balanced Line Output

From an unbalanced line level signal

balanced_line_out

Converting Balanced Line Level to Un-Balanced

balanced_to_unbalanced_line_signal

NOTE: The 22K resistors used here work great, but 22K can cause noise to be picked up from close digital tracks (e.g. 3.3V clock signals). We discovered just such a problem on a digital PCB causing pickup to occur at the negative op amp input and the remedy was to change to 2K resistors instead.

balanced_to_unbalanced_line_signal2
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