The Q value is the quality factor of an inductor, which is used to show the relationship between the energy stored and the energy consumed by the inductor. Its mathematical expression is listed as follows:

Q value=storage energy/consumption energy=XL/R=2πf*L/R

XL: inductive reactance (Ω)

R: resistance (Ω)

f: frequency (Hz)

L: inductance value (H)

From definition of Q value, it is obvious that the higher the Q value, the lower loss in digital communication circuits. The size of Q value directly affects the data transmission speed. However, there are three variables that determine the Q value, namely R: resistance (Ω) ,F: frequency (Hz) , L: inductance value (H).