How do I measure voltage between two nodes when neither of them is ground? In the schematic below, I want to measure the voltage between nodes Vmic and Vx. Is it just (Vmic-Vx)? I'm afraid that gives a wrong answer.
You can use
.meas Vmicpk MAX(V(Vmic)-V(Vx))*1000
Is it just (Vmic-Vx)?
Vx are node names and not voltages.
The voltages associated with each node are
The difference voltage between the two nodes is
Then multiply by 1000 if that's what you want.