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'[EE]: Simple AGC circuit found, can't find FET P-C'
2002\06\19@211946 by rusque (Listas)

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Hello,

   I've found a very interesting AGC circuit at
http://www.elecdesign.com/1998/aug0398/ifd/2IFD.pdf, but it asks for a
P-Channel FET with VGSoff < 5V.

   The circuit suggests J176, 2N5019 and 2N5116 but I can't find these
parts on Digikey. It seens to be very hard to find parts.

   There's a more popular part I could use?

   Best regards,

   Brusque

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2002\06\19@213013 by Tony Nixon

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"Edson Brusque (Listas)" wrote:
>
> Hello,
>
>     I've found a very interesting AGC circuit at
> http://www.elecdesign.com/1998/aug0398/ifd/2IFD.pdf, but it asks for a
> P-Channel FET with VGSoff < 5V.
>
>     The circuit suggests J176, 2N5019 and 2N5116 but I can't find these
> parts on Digikey. It seens to be very hard to find parts.
>
>     There's a more popular part I could use?
>
>     Best regards,
>
>     Brusque


Farnell have J176

Order Code  352-172
$Aus2.57

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Best regards

Tony

mICros
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.....salesKILLspamspam@spam@bubblesoftonline.com

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2002\06\19@213027 by Dwayne Reid

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At 10:10 PM 6/19/02 -0300, Edson Brusque (Listas) wrote:
>Hello,
>
>     I've found a very interesting AGC circuit at
>http://www.elecdesign.com/1998/aug0398/ifd/2IFD.pdf, but it asks for a
>P-Channel FET with VGSoff < 5V.
>
>     The circuit suggests J176, 2N5019 and 2N5116 but I can't find these
>parts on Digikey. It seens to be very hard to find parts.

I use LOTS of J176 fets - no problem finding them.  They are made by
Siliconix / Vishay as well as others.

dwayne

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2002\06\19@214032 by Rick C.

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Jameco has J176 $.59ea p/n140142
http://www.jameco.com
Rick

"Edson Brusque (Listas)" wrote:

{Quote hidden}

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2002\06\19@215315 by Dwayne Reid

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At 11:28 AM 6/20/02 +1000, Tony Nixon wrote:

>Farnell have J176
>
>Order Code  352-172
>$Aus2.57

Yikes!  Do they ship them in gold plated bags or what?!  I just checked -
the last batch cost me Canadian $0.30 each in hundreds.  Both Arrow and
Future had similar prices.

dwayne

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Dwayne Reid   <KILLspamdwaynerKILLspamspamplanet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax

Celebrating 18 years of Engineering Innovation (1984 - 2002)
 .-.   .-.   .-.   .-.   .-.   .-.   .-.   .-.   .-.   .-
    `-'   `-'   `-'   `-'   `-'   `-'   `-'   `-'   `-'
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2002\06\19@222852 by Tony Nixon

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Dwayne Reid wrote:
>
> At 11:28 AM 6/20/02 +1000, Tony Nixon wrote:
>
> >Farnell have J176
> >
> >Order Code  352-172
> >$Aus2.57
>
> Yikes!  Do they ship them in gold plated bags or what?!  I just checked -
> the last batch cost me Canadian $0.30 each in hundreds.  Both Arrow and
> Future had similar prices.
>
> dwayne

I guess buying in one's is expensive.


And wait for it....

You also get about $5 worth of paper work in two lots as a bonus :-)

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Best regards

Tony

mICros
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2002\06\19@231939 by Mike Singer

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Edson Brusque (Listas) wrote:
> Hello,
> I've found a very interesting AGC circuit at
> http://www.elecdesign.com/1998/aug0398/ifd/2IFD.pdf, but it asks for a
> P-Channel FET with VGSoff < 5V.
> The circuit suggests J176, 2N5019 and 2N5116 but I can't find these
> parts on Digikey. It seens to be very hard to find parts.
> There's a more popular part I could use?

  Since we are at PicList, you may get  Microchip's  digitally controlled potentiometers (MCP4XXXX) for Automatic Gain Control(AGC).

 Have look at: PlanetAnalog.com - Current Mirrors with a DCP offer precision and current gain control.
http://www.planetanalog.com/features/OEG20020529S0052

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