Description

Ceramic filters are electronic components used as the bandpass element for Intermediate Frequency (IF) amplifier stages of an FM radio. Ceramic filters can also be employed for other purposes such as AM and TV IF stages, but this page concentrates on their use in FM tuners and receivers.
Features:

• The action of a tuner “mixer” stage translates all FM stations down to a frequency of 10.7 MHz.
• The specification usually used for tuner selectivity is “alternate channel selectivity”
• Bandwidth 150KHz to 330KHz
• Operating frequency:10.7MHz
• For a “150 kHz” ceramic filter, then, the signal would be rolled off 3 dB at 10.625 MHz and 10.775 MHz.

Applications:

• Mostly used in FM Radio