>you will need to find (or generate) a higher voltage than
>the pic supplies to turn on the upper FET's in the bridge.
>I usually couple with an opto-isolator to the upper gates.
>It is cheap and clean.

And probably the easiest way to do it is a chip such as the Intersil
HIP4080, or some of the other HIP408x family. This chip will look after the
high side drive, and has programmable overlap control to stop both devices
on the one totem pole from conducting together. Reasonable current drive for
making the FETs switch fast - provided you use modern FETs with minimized
gate capacitance. If trying to use older FETs with high gate capacitance it
is difficult to get the dead time long enough.

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