>> Useful discrete high side driver discussion.
>> Last circuit is similar to what Olin does in some of his
>> SMPS high side drivers.
>> The low side emitter follower driver "trick" is a useful
>> one.
>>
>>> A useful discussion of how to build a fast efficient 
>>> gate
>>> driver for a high-side MOSFET/IGBT using discrete 
>>> components:
>>>
>>> http://www.innovatia.com/Design_Center/High-Side%20Drivers.htm


> The article seems to be flawed since it does not show
> how to get VGH.

"Incomplete" would be perhaps a better term. It's aim is to 
show how to get good drive speed and to lower requisite DC 
drive power levels. It focuses on core driver aspects and 
assumes the user will employ one of the many ways available 
of generating a suitable DC gate drive voltage.




            Russell

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