recnsci
Well-known member
[quote author="mediatechnology"]recnsci: Yep the resistor matching on the THAT 1240 (the non InGenius part) is close to 0.005%. Hard to get that with discretes. The 1200 InGenius input with its 10M effective common mode input resistance does virtually eliminate the output resistive imbalance of the source so you actually get the CMR in practice.[/quote]
Yes but there is price. That input configuration is not very good in stability
department. It wont like inductive sources, and opamps need to have very
big phase margine. Just try to make it with 5532 and see what happens.
You can increase stability, but at expense of reducing bootstrappin, thus
lower Zcm.
Makes you wanna use transformer and forget about whole deal.
ypow
Yes but there is price. That input configuration is not very good in stability
department. It wont like inductive sources, and opamps need to have very
big phase margine. Just try to make it with 5532 and see what happens.
You can increase stability, but at expense of reducing bootstrappin, thus
lower Zcm.
Makes you wanna use transformer and forget about whole deal.
ypow
