Sorry for the long post.

I have made a few general observations related to the usage of single supply and dual supply op-amps and wanted to know if I am moving in the right direction. Please correct me where wrong.

- If input signal is positive and has no -ve part then single and dual supply op amps are analogous?

- If signal is single ended (having both -ve and +ve part) and we have a single supply op amp - just bias the op amp at half the supply?

- If signal is differential (having both -ve and +ve part) and we have a single supply op amp what do we do now?

Could we add an offset to the input signal before giving it into the op-amp?

- If we have a dual supply op-amp it doesn't matter what type the input is?

Thanks in advance.