| 摘要 |
Explains automatic frequency control signal generating circuits. Especially, there is control signal generating circuit of automatic frequency control circuit or automatic fine tunning in television. The characteristics of this circuit are like this. No reduction in detecting sensitivity is guaranteed by ripple component of frequency discriminator output. And this circuit has level comparing function with IF. signal frequency discriminator output, and this compared output is peak-holded by special circuit and generate control signal due to its output.
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