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3.A6机芯图像信号流程由电视天线接收下来的射频电视信号,送入高频调谐器U101,经U101的选择放大和变频,产生出中频电视信号,从U101的①端输出。该中频电视信号经C110、C111、C112、L101组成的带通滤波器的滤波,抑制掉因混频产生的谐波干扰,然后通过预中放V101放大和声表面波滤波器Z101、L102、C113、C114、V110等组成的中频特性滤波电路滤波,一次形成所需要的中频幅频特性。从而完成抑制邻频道干扰,适当衰减本频道的伴音中频信号、图像中频信号和色副载波中频信号的任务,保证电视机有良好的选择性,保证正常
3.A6 movement image signal process By the TV antenna down the radio frequency television signal, into the high-frequency tuner U101, U101 by the choice of amplification and frequency conversion, resulting in the IF television signal output from the U101 ① end. The intermediate frequency television signal by the C110, C111, C112, L101 filter composed of band-pass filter to suppress the harmonic interference generated by the mixing, and then through the pre-V101 amplification and surface acoustic wave filters Z101, L102, C113 , C114, V110 and other components of the IF filter circuit filtering, the formation of the required IF frequency characteristics. So as to complete the task of suppressing adjacent channel interference and properly attenuating the audio intermediate frequency signal, the intermediate frequency signal and the color subcarrier intermediate frequency signal of the channel, so as to ensure the good selectivity of the television set and ensure the normal