adjustable capacitor is used for inductance coil and the vibration element to adjust the resonant frequency, high temperature resistant touch switch adjustable capacitor in practical application with the same capacitor with fixed function, but his flexibility is the capacity size can be adjusted, after changing the data, to complete and complete the circuit resonance inductance components. Generally speaking, one of the main indexes of tunable capacitor is the concave and convex of resonant frequency. The higher the resonance frequency, the better the density. The recognition method of
tunable capacitor:
ceramic capacitor of the nominal capacity of the general scale marked on the trimmer capacitor side surface, such as 7/30, 5/20, 3/10 etc., which shows that the minimum molecular volume, the denominator indicates that the maximum capacity, unit is pF.
connection trimmer capacitor nominal capacity, color points indicate that some of the wiring trimmer capacitor color point position at the top, and the other color point calibration chip pin. The type of
film adjustable capacitor is as follows: the following types of tunable capacitor types are described.
1, master weighing C, indicating capacitor, B indicating tunable, M indicating film dielectric.
2, even with a number of figures show the number of companies, such as four for 4 shows that double that for 2.
, 3 additional tuning capacitors by count the number that indicates how many additional tuning capacitors, with 0 indicating that no additional tuning capacitor, for example, CBM-443BF is an additional four trimmer one four.
, 4 figure code indicated by figures size (unit mm)
5, the maximum nominal capacity of code letters show that (pF)
in amplitude and frequency even in A ~ Q and F letters and, during A ~ Q letters show that even the largest amplitude nominal capacity, F shows high frequency maximum nominal capacity so, FM even have two letters that were even amplitude maximum nominal capacity, and even FM such as CBF-443BF, which shows that B amplitude maximum nominal capacity, F showed that FM maximum nominal capacity.