AVR-Chat

Graham Davies wrote:
> --- In AVR-Chat@yahoogroups.com, Robert Adsett <subscriptions@...> wrote:
>> The diode is inevitable in
>> the MOSFET structure isn't it?
> 
> No, I don't think so.  Diodes between both source and drain and the substrate are usual, but you can get rid of those too if you don't want them (in the extreme case, using silicon-on-insulator technology).

Hmm, I hadn't considered SOI.

> I've no idea how this works with individual MOSFETs, which tend to have very complicated structure these days.  I would absolutely not make any assumptions that are not backed up by the manufacturer's data sheet.

I've never seen any without a parasitic diode.  Usually characterised to 
some extent.  Recently all the power MOSFETs I've seen have the 
parasitic diodes rated to the same current and power capabilities as the 
MOSFET proper.

Robert

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