I am trying to build a Wheatstone circuit to detect temperature changes of a low resistance (about 10 ohm) wire.
For a first try I would like to use a circuit proposed in this Maxim Application Note 6144 How to Linearize Wheatstone-Bridge Circuit for Better Performance, Figure 7:
I am a beginner in using and understanding schematics. So in general I have two questions for the beginning:
As stated, the circuit in figure 7 is an example to be used with a PT1000. I guess that's why R1 and R3 were chosen to be 1k Ohm? What needs to be changed if R3 is only 10 ohm for example?
In the example, some capacitors don't have values. Some are names
C_HOLDor don't have a name. Can you guys explain to me why they are named like that and what values would make sense in this circuit?