The function of the sampling resistor in the circuit is well understood. In many cases, the number of sampling resistors in the circuit will also have many models, and they play their respective roles in the circuit. However, when we often look at the circuit diagram, it is not difficult to find out why one place often sees two sampling resistors at the same time. Why not use one sampling resistor, but design it into two. Is there any problem with the engineer designing the circuit, or is there any special significance in designing the circuit?

 I believe that many people will have the above-mentioned questions. In fact, we have also conducted careful analysis, and experienced engineers will design resistors in this way. Many primary circuit designers generally don't understand the significance of these designs. Let's analyze the advantages of using such designed sampling resistors.
 
First, it is beneficial to the heat dissipation of the sampling resistor and prolong the service life of the sampling resistor.
 Using two sampling resistor designs, this is very beneficial for the heat dissipation of the resistor, we know that the resistor is very susceptible to temperature changes.
When two resistors are used in parallel with the same current flows, most of the two resistors use a small temperature rise in parallel. The power that the resistor can withstand at a temperature higher than 70 degrees, power withstood will drop significantly, so that the two resistors are connected in parallel. The circuit will work better.

Second, the combination of two sampling resistors can give the ideal resistance value
In order to get a better resistance value in the circuit, experienced circuit designers usually use a combination of multiple resistors. This circuit design can be seen in many electronic products. The combination of sampling resistors allows the line to achieve the desired resistance value.
 
The above two points are the reason why the circuit designer uses two sampling resistors. This design will improve the safety of the circuit, which will help plan the circuit and extend the life of the sampling resistor. It can be said that all circuit designers who are worthy of this design can effectively improve the stability of the entire circuit design.