Q what is the meaning, why is it important?
Quality factor Q: characterization of an energy storage device (
Or Q = / active power reactive power, or the ratio of the characteristic impedance and the loop resistance.
The higher the Q value, the smaller the loss, the higher the efficiency;
Q value is higher, the higher the frequency stability of resonator, therefore, can be more accurate.
Defines the quality factor of capacitance, Q value, also is the capacitance of the storage power loss and power than: Qc = (
The reciprocal of Q value is equal to the D value.
24 the following.
The following 01.
k type及s / c type为。
025 the following.
T/C type, its specification to Q value is said to be higher than 400 -
Note: XC = -
根据损耗因可数d的定义:d = 1 / q = r / | x | & gt;
0 to plug in the previous formula, get: if leakage between electrodes can be ignored, that is, the impedance of the Rp infinity (
Or is far greater than the impedance of the relative to the capacitance value of C)
计算公式,损耗因可数d大大简化为:我们信号频率远远小归于srf谐振此时率,则x c & gt;>
X L, namely X L can be ignored, it further simplify the formula mentioned above: the figure shown, the capacitor
lead inductance would reduce with the increase of frequency and the characteristics of the capacitor.
As a result of this series resonance to create a very small series impedance, so it is suitable for applications in the radio frequency circuit of coupling and decoupling circuit.
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