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  1. #1
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    Did early power MOSFETs have body diode?

    Also I would like to know if small-signal MOSFETs have body diode.

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  2. #2
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    Re: Did early power MOSFETs have body diode?

    Vertical MOSFET, e.g. all power MOSFET have the substrate tied to source by design. Respectively there's always a "body diode" connected in parallel to DS.

    Small signal MOSFET have the source terminal junction-isolated from substrate, but many discrete devices have source and substrate internally connected though. A few discrete devices are equipped with separate substrate terminal.



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