SV: Re: [sdiy] THE LM13600/LM13700 STORY

[karl dalen]

--- ASSI <Stromeko at compuserve.de> skrev:
> The CMRR for the CA3280 topology is still higher due to the better 
> process and improved matching from interdigitated layout.  The CA3280 
> process is also much advanced as the GBW figure alone will tell you.  
> The Achilles heel of the LM13600 is quite likely a low-beta pnp mirror.

Ah! So the beta of q6, q7 cuses poor CV rejection?
But wouldent that also be valid for the NPN sink, q1,q2?
Or at least a miss match in beta between these two pairs?

KD (i dont know anything about silicon design, i merly guessing!).


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