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?
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?