Interference (FM) radio frequency interference cancellation circuit

摘要

[0001] The present invention relates to an interference frequency affecting TV broadcasting, and more particularly, to an interference frequency that affects TV broadcasting, and more particularly, to an FM radio broadcasting frequency band transmitted from an SBS broadcasting station, Circuit.;Generally, since the frequency band transmitted from each broadcasting station (for example, KBS1, KBS2, and MBC) is different from the FM radio broadcasting frequency band, the interference frequency is not generated. However, in the case of the recently established SBS broadcasting station, the FM radio frequency band (89.1-95.1 Are connected to each other to sense the broadcast signal transmitted from a plurality of broadcasting stations in order to overcome the disadvantage that interference of the SBS broadcast occurs and output the signals to the diodes D1 to D2 at high / low level potentials, An adjusting means for controlling the field effect transistors FET1 and FET2 according to the SBS channel selection signal output from the microcomputer and a track circuit for removing an interference frequency among the SBS broadcast frequencies of the FM radio broadcast frequency, The present invention provides an interference cancellation circuit for FM radio broadcasting that eliminates an interference frequency generated when a user watches a video.;As described above, the present invention is an invention that enables a viewer to view a good picture quality and sound of an SBS broadcast by eliminating frequency interference generated due to a relationship between the FM radio broadcast frequency and the neighboring frequencies.