Thermal noise and excess noise are two major sources of resistance noise. Let's share the source of noise with everyone:
The first point: thermal noise; these can determine the resistance due to the mechanism of the resistor itself and the operating state mode that is running in the circuit.
The resistance heat effect in the work process is only the size of this thermal effect, because now all electronic components will heat up.
The resistance thermal noise will have the following performance. First, when the temperature of the resistor rises in the working state, the conductance inside the resistor will do
Irregular movements that we are not familiar with, these irregular movements will cause irregular currents in the current directional flow of our currents.
The heat current is formed, and the thermal noise current is further generated by the resistor to generate a thermal noise voltage.
Thermal noise for the resistor.
The second point: excess noise; these special resistors such as plug-in resistors, wafer resistors, chip resistors, etc. are the resistors we use today.
Product. In addition to the thermal noise we talked about during the operation of the current, the resistor will produce another kind of another that we call the two major categories.
Noise-like: Excess noise. Because the film of our resistor itself is not very uniform, its current does not flow evenly in the case of current flow.
Each area of ​​the resistance, such a result will make a certain area of ​​the resistance appear dense, once it is dense, it will produce
The excess current noise we are talking about. The other is that the resistance column is essentially due to the combination of a large number of conductive particles, once the voltage is imposed on the outside.
In the case of the situation, there will be irregular and non-directional movements, and the resistance value will also change with the matching.
In the case of the system, our resistors will also generate excess current, and the excess current necessary for excess noise will only be the resistance of my side.
Current noise is related to other factors such as resistance, current passing, and the strength of the current. Http://