| 摘要 |
A magnetic recording device provided with a frequency modulation circuit, a filter circuit, and a frequency conversion circuit. The frequency modulation circuit generates a modified FM luminance signal the frequency of a carrier wave of which is higher than that of an FM luminance signal and the relationship between the frequency of a sink chip and the frequency of a white peak of which is equal to the relationship between the frequency fs and the frequency fw of the FM luminance signal when the minimum frequency of the frequency band of the FM luminance signal is the frequency fa. The filter circuit removes a signal component lower than a cut-off frequency of signal components included in the modified FM luminance signal when a frequency. lower than the minimum frequency of the band of the modified FM luminance signal by a frequency acquired by doubling the frequency fa is the cut-off frequency. The frequency conversion circuit generates the above FM luminance signal by converting the frequency of output from the filter circuit by using a local oscillated signal of a frequency lower than the frequency of the carrier wave of the modified FM luminance signal.
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