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Low cap PMOS

Discussion in 'Electronic Design' started by Fred Bartoli, Dec 8, 2012.

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  1. Fred Bartoli

    Fred Bartoli Guest

    I think it was J.L. who gave a few weeks/months ago the reference of a
    nice small PMOS with IIRC half the parasitics of a BSS84, but I can't
    find it...

    John, can you give it again?

    Thanks.
     
  2. Joerg

    Joerg Guest

  3. Fred Bartoli

    Fred Bartoli Guest

  4. Joerg

    Joerg Guest

    That's on account of the built-in gate-source zener. You'll want a FET
    without that. Slim pickens, as they say over here, not too much to pick
    from.

    If there is the slightest chance to swing this circuit to N-channel then
    by all means I'd do it.
     
  5. I have used FDV302P in some cryogenic work,
    it also has pretty low Ciss.

    Regards,
    Mikko
     
  6. Joerg

    Joerg Guest

    Ooops, sorry, I read gate capacitance but that's not what you meant.
     
  7. Fred Bartoli

    Fred Bartoli Guest

    Joerg a écrit :
    Ah, I wondered what the zener had to do with the gate resistance :)
     
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