[sdiy] Matched transistors - critical parameters?

[Stewart Pye]

HI Matthew,

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

http://au.element14.com/nxp/bcm856bs/transistor-pnp-pnp-matched-sot363/dp/1829187

Regards,
Stewart.


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?
>
>