Should the capacitance of the 0khz resonant circuit 6.8nf be CBB capacitor or mica capacitor?
Small power with the front on the line, high-power mica capacitor
The performance of the capacitor depends on the dielectric material and has little to do with the form of the package.The same package capacitor dielectric material is different, CBB is there, but such a large capacity capacitor is more two ceramic, namely ferroelectric ceramics, capacity is not stable, the purchase must be careful!20kHz frequency, as long as the capacity of stability on the line, unlike high-frequency applications, dielectric loss do not have to care about. If there are samples in hand, you can test this: at the same time measuring capacity, bake with electric iron, if the capacity does not change, you can use. The capacity of ferroelectric ceramic capacitors varies substantially.
These two capacitors are very stable capacitors, and very small losses can be used. In recent years, mica capacitor has been relatively rare, and the volume is larger, using CBB is more common.
