| 摘要 |
PURPOSE:To decrease the number of bits of a time base correction element and to reduce cost by supplying the frequency conversion output to a clock answer delay element for elimination of time base fluctuation. CONSTITUTION:When an RF signal is supplied to a BPF 22, the audio carrier wave element is extracted and supplied to a mixer 23. Then the components of beat waves with the output of a fixed oscillator 24 as well as the audio carrier wave component are obtained from the output of the mixer 23. This output is supplied to an LPF 3 and the prescribed beat component is extracted to be supplied to a CCD 4 serving as a time base correction element in the form of the audio carrier wave component underwent the conversion of frequency. The signals underwent the correction of time base are supplied to FM demodulators 7 and 8 via BPF 5 and 6. Thus the audio signals are obtained for L and R channels respectively. |
