[sdiy] transistor matching circuit

[Peter Grenader]

their beta (vbe) should be fine.   There are circuits all over the net that
show how to do this fairly simply - i thik Pathell has on if memory serves.
it's all up to the accuracy of your volt meter or scope.  A curve tracer
comes in real real handy for this, but hardly worth the expense if you
aren't matching for a living!


James Patchell wrote:

> I just match Vbe
> 
> http://www.oldcrows.net/%7Epatchell/matcher/matcher.html
> 
> At 11:10 PM 12/13/2004 -0800, Peng wrote:
>> I need to match transistors for VCO expo convertors (some PNP pairs,
>> some NPN pairs). Can anyone give me a link to relavent transistor
>> matching circuits or a page with info on the subject (what parameters to
>> match, etc.) ?
>> 
>> Thanks,
>> P.v3
>> 
>> 
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> 
> -Jim
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