Op amp gentle phase fold?

[MT]

The CA3260 and 3160 have the peculiar feature gentle phase folding while most opamps abruptly phase reverse.
is there any other opamp that does the same as CA3160?

[Benta]

Do you mean that the output does not phase reverse when the input goes below the negative rail?
Quite a lot of opamps have this, I've seen several from NSC and TI. It has to be specifically mentioned in the datasheet.

[MT]

Unipolar supply.

Phase reversal




Phase folding:

[Audioguru]

The datasheet for the CA3160 says that it does not reverse the phase when its input goes 7.5V below ground when it has only a positive 15V supply.
Its common mode input voltage range is -0.5V to +12V with a single +15V supply. 

[Benta]

This is all fine, but I still don't understand what the question is.
Perhaps MT could enlighten us?

[mikerj]

This is all fine, but I still don't understand what the question is.
Perhaps MT could enlighten us?

Seems pretty obvious, he is asking if there are any other op-amps that display the same phase characteristics as the CA3260 when the common mode range is exceeded.  I don't know of any myself.

[MT]

Mikerj nail'ed it!   There are some old PNP amps that also folds but does it ugly. Phase folding is a natural transistor phenomenon.