My question is simple. I'm designing a circuit and read some articles saying that you need to provide a DC bias current return path. These articles always referenced using them with floating inputs and when ac coupled. I've also seen this referenced in many adc datasheets. I have a return path for the inputs of my amp. My question is do I need a return path between the amp and adc or would that be taken care of innately by the amp?
My design is like the bottom one. I have quite a few amps connected to the adc so if the resistor is unnecessary that would simplify the design a bit. Thanks for any insight you guys can provide. Not sure if this affects anything but I'm using instrumentation amps.