At page 13 of this Analog Devices document there is a circuit which consists of a servo amplifier and a bridge. The operation principle is explained in the document. Here is the the schematics given:
I wanted to simulate this circuit in LTspice with following same circuit:
According to document node A is the output. But this doesn't work at all. So basically:
How come the suggested circuit function at all? Initially there is no voltage at node A.
If it can be modified and work in LTspice, now my challenge will be simulation. Since this circuit tries to make Rf constant with respect to cooling effect, how could this be simulated to see the transient analysis to mimic its operation?
Edit: The second part needs to be a separate question