Connect with us

SMP identification: please help!

Discussion in 'Electronic Components' started by Reinhard Zwirner, Dec 4, 2009.

Scroll to continue with content
  1. Hello,

    I'm asking for help with identification of three sm devices.

    1. Q1, marked "I GE": probably N-channel JFET
    _
    2. D2, marked "A 7": diode or BJT used as a diode
    <http://www.bilder-hochladen.net/files/12b4-4w-jpg.html>

    _
    3. Q2, marked "M 5": probably PNP BJT
    <http://www.bilder-hochladen.net/files/12b4-4x-jpg.html>

    BTW, the photos show the PCB of Sony's AN-102 active antenna.
    Q1 works as RF amp, D2 (and not shown D1) are used for input
    protection.

    Q2 is the electronic switch which connects the RF amp stage to
    the supply voltage.

    TIA

    Reinhard
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-