Class-D Amp with Discrete Gate Drivers

[enzoR]

Originally posted by Workhorse
Hi Charles , So whats ur opinion on using dual comparator LM319 for obtaining out of phase PWM signals????.

Regards
AMPmaN

Im trying this myself, but how does one adjust dead time in this manner?

[phase_accurate]

Do you want to make deadime adjustment by the use of two comoparator, right ?
You can only do this properly with carrier-based amps. You simply use different reference levels for both comparators.
You can see this on a very old schematic of minr that I have posted on this forum somewhere.
I'll have to find it agin first.

Regards

Charles

[enzoR]

Yes, deadtime adjustment by two comparators. It is carrier based.
By differnt reference levels, do you mean the carrier (triangle wave) is shifted higher up ( a DC offset) before it enters the other comparator?

Would this be done by decoupling the triangle wave before entering one comparator and then add a DC voltage on to it?

[DJ Exprice]

Originally posted by Circlotron
It's just on midnight here and my ISP is about to time-out at 4 hours. Gotta go. In the meantime, tell us all how those suggestions go.

Australian ISPs blow hard in an unconventional way, don't they.

I feel your pain, and so does my other friend down there.