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

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Presentation on theme: "Riso with Dual Feedback Plus RFx Op Amp Stability OPA192 Definition-by-Example Collin Wells Tim Green Precision Linear Analog Applications December 2,"— Presentation transcript:

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

2 Riso with Dual FB plus FX Topology 2

3 Zo Test 3

4 4

5 Zload on Aol 5

6 Modified Aol 6

7 7

8 FB#1 with CL=10uF, Riso=37.4ohms 8

9 9

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

11 FB#2 with CL=10uF, Riso=37.4ohms, RF=1k, RFx=10k 11

12 FB#2 with CL=10uF, Riso=37.4ohms, RF=1k, RFx=10k 12

13 Loop Gain for CL=10uF, Riso=37.4ohms, RF=1k, RFx=10k 13

14 Loop Gain for CL=10uF, Riso=37.4ohms, RF=1k, RFx=10k 14 Phase Margin = deg

15 Transient for CL=10uF, Riso=37.4ohms, RF=1k, RFx=10k 15

16 Transient for CL=10uF, Riso=37.4ohms, RF=1k, RFx=10k 16


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