782422331 High frequency magnetic SMD ferrite/ceramic multilayer chip beads Inductor

Integrated crystal filter:
There are three types of crystal filters made by integrated circuit technology: single chip, serial single chip and multiple chip.

Series monolithic crystal filters are composed of several capacitance-coupled monolithic crystal filters. Its advantage is to adjust the operating frequency and inhibit parasitic frequency.
The multi-chip crystal filter consists of a series of coupled resonators, a parallel single resonator, and a capacitor. Its characteristic is that it can form a number of attenuation peaks on the frequency near the passband, which is beneficial to suppress interference and improve filtering performance.
Integrated crystal filters are small in size, high in reliability and low in cost. However, its central frequency is only 4.5 to 350 MHZ, and its relative bandwidth is 0.01% to 0.3%. Therefore, it cannot replace the vertical crystal filter when the central frequency is low and the passband width is wide.