[sdiy] UA726 clone possible?

[rsdio at audiobanshee.com]

My impression is that having the transistors on the same substrate - inside the same chip - gets you 99% of the way towards matching. It may not be worth the trouble of worrying about which transistors are closer to each other. Of course, there might be some minor advantages to being that careful about the design.

In power amplifiers, discrete transistors are simply placed on the same heat sink to allow the temperature compensation to do its thing.

Brian


On Sep 12, 2015, at 1:49 AM, Stewart Pye <stewpye at optusnet.com.au> wrote:
> Thanks. I'm not sure how the THAT300 is laid out. I guess if pairs of transistors were closer to each other than the other transistors then you'd use one pair for the expo converter and one for the sensor/heater. You certainly wouldn't want to heat one of the expo transistors more than the other. I'll see if I can get more info from THAT about how the transistors are laid out.
>