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Old 6th February 2006, 04:43 AM   #1
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Default Circuit for Pseudo Differential Input?

I would like to see an example circuit for treating an RCA input as if it were differential.

What I have so far is:

a - Pi filter with ferrite bead and 10pF capacitors on each side of the bead, this on both the signal and ground pins of the RCA.

b- 1uF film caps coupling into gang 4 potentiometer, L+, L-, R+ and R-

c- Potentiometer terminated into buffered local reference voltage.

d - potentiometer taps going into a HiZ difference amplifier

Does this seem like a good approach?
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