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Dual gate MOSFET.

Discussion in 'Electronic Components' started by ian field, Jan 14, 2008.

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  1. ian field

    ian field Guest

    Gone are the days when I used to service TV sets and could easily obtain the
    occasional BF981 from a scrap tuner.

    These days I obtain the occasional modern miniature tuners with very tiny
    SMD MOSFETs with no markings, The Peak/Atlas component analyser will read it
    as a MOSFET with the 3rd test lead connected to either gate in turn, but it
    can't tell which way round the d & s pins are or which gate is which.

    Anyone know of a way to determine these finer points?

  2. Tilmann Reh

    Tilmann Reh Guest

    Perhaps you have a short look at the data sheet(s) of NXPs BF99x series.
    They all share the same package and pinout and are pretty common.

    G2 -| |- D
    | |
    G1 -| |= S (larger)

  3. ian field

    ian field Guest

    Thanks that might work - do the far-eastern manufacturers follow the same
    pin layout?
  4. Joerg

    Joerg Guest

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