SMD identification: please help!

[Reinhard Zwirner]

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

 

[Meat Plow]

On Fri, 04 Dec 2009 18:11:09 +0100, Reinhard Zwirner
<reinhard_zwirner@web.de>wrote:

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

:http://tkb-4u.com/codes-and-markings/smd-codes-markings/database