Re: 10+MHz SSTC Gate Drive Circuit Finalized

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: dhmccauley-at-spacecatlighting-dot-com 

There is a mistake in my schematic.  I'll correct it and repost it.

The beauty of this circuit, is that the peak current required to drive the
gate of the FET is coming almost completely from the 1uF capacitor.

Dan


 > At first look I liked the circuit!  But then...do I miss something or is
 > each driven gate paralleled with its FDN360P's intrinsic diode in series
 > with 10 ohms, whenever there's supposed to be a + voltage applied to
 > it?  If so, then the NPNs' outputs during "on" times must drive those
 > diode/10 ohm branches.  Not so good...?
 >
 > Ken Herrick
 >
 > P.S. to Terry Fritz:  United Online (Juno, etc.) still blocks the Tesla
List.
 >
 > In a message dated 9/16/03 9:26:07 PM Pacific Daylight Time,
 > tesla-at-pupman-dot-com writes:
 > Original poster: dhmccauley-at-spacecatlighting-dot-com
 >
 > I finished the schematic this evening for the ultrafast, high power gate
 > drive circuit I am using for my 10MHz+ SSTC (ion tweeter stuff) and what
 > i'll also be using for my new
 > 10kW+ SSTC.  This gate drive circuit provides faster turn on and turn off
 > times then you could get with any conventional type of MOSFET gate drive
 > circuit.  The only downside
 > is the complexity of the circuit.  But once its built and working, it is
 > sweet.
 >
 > http://www.spacecatlighting-dot-com/datasheets/sc2037_sheet2.pdf
 >
 > The circuit in the schematic is derived from my 10MHz+ SSTC work and is
 > shown with SMT components.  For big FETs like IXFN type, you'll need to
 > scale up the
 > components with beefier ratings and power ratings accordingly.
 >
 > The Captain
 >
 >
 >
 >
 >
 >