[sdiy] Matched transistors - critical parameters?

Stewart Pye stewpye at optusnet.com.au
Fri Feb 10 23:47:55 CET 2012

HI Matthew,

If you use the BCM series they are matched to a maximum of 2mV (Vbe1 - Vbe2)



On 2/10/2012 7:48 AM, Matthew Smith wrote:
> Quoth ASSI at 10/02/12 06:55...
> ...
>> You can do quite a bit better than 1mV by hand using the balanced bridge
>> measurement method; Ian Fritz routinely matches to tens-of-micro-Volt
>> levels(*).
> Thanks, Achim, more interesting stuff! Finding this topic fascinating.
> As we're talking SMDs, footprint on a PCB (mine are gold-plated 
> anyway) and some sort of spring clip to hold the part down?

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