Low side voltage conditioning : A question about Millman

[Student_GEII]

Hello,

When I was looking through the schematics of the power leg for the purpose of creating a simulation, I stumbled upon the Low side voltage conditioning block :

Which contains a description of the behavior of the OP-Amp using Millman’s theorem :

However, I find that, I if try to redo Millman’s theorem myself, I find a totally different values :

So I think I may not really understand the circuit, and thus hereby seeks someone to help me understand where I got it wrong.

Any help is appreciated !

P.S : Here is the simplified schematic I used when redoing Millman’s theorem on the circuit :

[luiz_villa]

Hello there,

Thank you for your post.

Here’s my Millman development:

I obtain the same result as in the schematic, albeit with a much more simple equation.

I can update the equation on the schematic, I think it will be much more readeable.