I'm looking for a way to introduce a small amount of dead time into an H-bridge. Switching frequency is up to 250kHz, so I'm looking to introduce about 500nS or maybe a bit less of dead time.
I have seen a simple technique that involves delaying the drive pulse by 1/2 the required dead time, then and/nor-ing with the base drive signal to get the phase/anti-phase drive signals...
However, I have no idea how to implement the delay to the incoming drive pulse by approx. that time - I have one spare 74HC75 FF in the non-dead-time version of the circuit and can add other logic if required, but I'm really trying to keep this simple if I can. I'm using deicrete 74HCxx logic and would prefer not to use a specialised drive chip with inbuilt dead-time if possible,
Thanks for any ideas...