[SOLVED] Crystal oscillator and MOSFET gate drive

[junjunss]

Hi guys,

I'm trying to build a mosfet gate driver circuit at 13.56MHz using crystal oscillator to generate a square wave to wave with 5v peak. Is there any schematic i could look at for this project

Any help will be appreciated.

 

[mtwieg]

You'll need some sort of amplifier between the oscillator and the FET gates. Depends on the drive current required. If the FET is small and your layout is good, a bunch of high speed logic gates in parallel can drive FET gate pretty well at 5V. If Ciss is large, you may need a resonant gate drive, in which case you end up with a sine wave gate waveform.

 

[junjunss]

I'm planning to use ZXGD3001E6 as a gate driver. However, I do not understand how to use it as a amplifier to drive the gate.

by generating a square wave using logic gate I suppose that the circuit u mean by using the circuit below?

 

[vfone]

Propagation delay of ZXGD3001E6 is very short (~ 1nsec), output following very fast the input.
I think for a 13.56MHz application you can just place ZXGD3001E6 in front of the oscillator gate, and it will work.