Hi,
My question is regarding matching the source impedance of a non-inverting configured op2134 with the parallel impedance of its feedback resistors. The circuit is such that the input from the instrument will be ac coupled into the + terminal followed by a 1Meg resistor to gnd from the + terminal. The output impdance of the instrument will vary (100 ohms or less up to 100k+) due to it being active or passive. According to page 9 of the OPA2134 data sheet, the Source impedance should ideally match the parallel resistance of the feedback resistors for lowest distortion.
Do you have any recommendations as to what the best value range these feedback resistors should be for this application.
Thank you,
Jim