| 摘要 |
A channel selection signal is inputted from the key input part(10) and then, CPU(19) outputs channel selection control signal to the tuner(14). At this time, the tuner(14) selects the broadcasting signal of the corresponding channel and outputs to the intermediate frequency processing part(16), converting it to the intermediate frequency and outputting each the synchronous detector(18) and the band pass filter part(22) then the automatic frequency control voltage. Further, the synchronous detector(18) detects the synchronous signal and outputs it to CPU(12), the band pass filter(22) conducts the band pass filtering and outputs it to FM detection(24). FM detection part(24) detetcs FM for outputting a voice carrier signal to the CPU(12).
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