Riso with Dual Feedback Plus RFx Op Amp Stability OPA192 Definition-by-Example Collin Wells Tim Green Precision Linear Analog Applications December 2, 2013

Riso with Dual FB plus FX Topology

Zo Test

Zo Test

Zload on Aol

Modified Aol

Modified Aol

FB#1 with CL=10uF, Riso=37.4ohms

FB#1 with CL=10uF, Riso=37.4ohms

FB#1 with CL=10uF, Riso=37.4ohms Add FB#2 for Stability

FB#2 with CL=10uF, Riso=37.4ohms, RF=1k, RFx=10k

FB#2 with CL=10uF, Riso=37.4ohms, RF=1k, RFx=10k

Loop Gain for CL=10uF, Riso=37.4ohms, RF=1k, RFx=10k

Loop Gain for CL=10uF, Riso=37.4ohms, RF=1k, RFx=10k Phase Margin = 89.45 deg

Transient for CL=10uF, Riso=37.4ohms, RF=1k, RFx=10k

Transient for CL=10uF, Riso=37.4ohms, RF=1k, RFx=10k