AnalogSteph
Major Contributor
That's funny. To be fair, I assume the normal signal levels encountered in hydrophone applications are substantially lower than those needed to make nonlinear input capacitance a major issue, so he may just never have seen it. You'd rarely be shooting for both sub-µV noise and +20 dBu signal levels (like Samuel Groner was testing at) at the same time.BTW the uber-guru of all hydrophone designers called me personally at my desk to tell me these common mode capacitance effects were nonsense and didn't exist.