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A SSTC oscillator



Original poster: Finn Hammer <f-h-at-c.dk> 

Gang,

I am searching for an oscillator for a SSTC. From my limited experience,
it appears, that there are 2 importand design criteria that must be met,
if the H-bridge is going to be able to switch quietly and cool:

It must be driven in tune with the load, and with as litle dead time as
possible.

The issue of dead time rules out the TL494. Although it has been the
workhorse in the development of SSTC`s, it cannot go below 3% deadtime.
If there is deadtime, there is hotswiching, and therefore noise.

The other issue is tuning. I would like to use the method suggested by
Ken
Herrick, where the voltage across a cap in the ground lead is derived
into a square wave which the oscillator locks onto.

The MAX038 function generator fits the bill, if it was not for the
prize, so the question is this:

Anybody know of a chip that can deliver a 50%/50% square wave, and has
the ability to lock on to an external square wave?

Cheers, Finn Hammer