there are line drivers and op amps with complimentary outputs, i suspect
one of those would do what you want.  depending on the application, you
might also want to add a short "dead time" where both signals are
low/high, this is often done in switching supplies (and H bridges) to
keep both transistors from being on at the same time.

Martin Klingensmith wrote:
>
> Hi Joe,
> I need 2 identical PWM signals 180 degrees out of phase:
> [view with a fixed-width font]
> ______------______------
> ------______------______
>
> If the pulse width were varied, it would not just be an inverse:
> ______----______----_
> ----______----______-
>
> Thanks for replying though
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