looking for lm394 or equilvalent

M

Mikegw

Guest
Hello all,

I am looking for a matched transistor par to make a current mirror (rails +-
5V, 500ľA down to 100nA). At the moment I am looking at ~$20-30 for one
LM394 from farnell or RS. Anyone with a WES catalog handy for prices? Also
can anyone suggest other matched transistor pairs to build a current mirror
with the above specs?

Cheers

Mike
 
"Mikegw"
Hello all,

I am looking for a matched transistor par to make a current mirror (rails
+-
5V, 500ľA down to 100nA). At the moment I am looking at ~$20-30 for one
LM394 from farnell or RS. Anyone with a WES catalog handy for prices?
Also
can anyone suggest other matched transistor pairs to build a current
mirror
with the above specs?
Click to expand...

** The 2SC1583 dual NPN is available from WES for $ 1.85 each.

http://www.milton.arachsys.com/nj71/pdf/2sc1583.pdf


Specs are good too - often used in analogue synth VCO circuits and
amplifier differential inputs.





............... Phil
 
** The 2SC1583 dual NPN is available from WES for $ 1.85 each.

http://www.milton.arachsys.com/nj71/pdf/2sc1583.pdf


Specs are good too - often used in analogue synth VCO circuits and
amplifier differential inputs.


Cheers,
Click to expand...

That saves me a few dollars.

Would it be pushing the friendship if I asked if there existed a pnp
equivalent?

Mike
 
"Mikegw"

Phil Allison

** The 2SC1583 dual NPN is available from WES for $ 1.85 each.

http://www.milton.arachsys.com/nj71/pdf/2sc1583.pdf


Specs are good too - often used in analogue synth VCO circuits and
amplifier differential inputs.


Cheers,

That saves me a few dollars.

Would it be pushing the friendship if I asked if there existed a pnp
equivalent?
Click to expand...


** No problemo - its the 2SA798 ( WES have them too)

One of each was used in the front end of several old SAE power amps - "
...... differential complimentary symmetry" .

Way to go in 1977.





............. Phil
 
On Mon, 16 Aug 2004 21:44:19 +1000, "Mikegw"
<mikegw20@spam.com.spam.hotmail> wrote:

|Hello all,
|
|I am looking for a matched transistor par to make a current mirror (rails +-
|5V, 500ľA down to 100nA). At the moment I am looking at ~$20-30 for one
|LM394 from farnell or RS. Anyone with a WES catalog handy for prices? Also
|can anyone suggest other matched transistor pairs to build a current mirror
|with the above specs?
|
|Cheers
|
|Mike
|
WES don't list LM394.

They do list 2SC3381 at $2.10
http://www.milton.arachsys.com/nj71/pdf/2sc3381.pdf
so if you can use this in your design it should work fine.
 
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