| 摘要 |
PURPOSE:To operate at high speed and to make the scale of a circuit smaller as a whole by converting an inputted digital signal series which is in an orthogonal phase relation to a phase information by a conversion table and detecting a timing information included in the signal series from the output of the conversion table. CONSTITUTION:A pair of signals having the orthogonal phase relation which are converted orthogonally and are obtained from a digital modulating signal at a receiving side are inputted to terminals 1 and 2 and after converted to digital signal series at A/D converters 3 and 4, they are inputted to a conversion table 5. The conversion table 5 outputs the phase information corresponded with the combination of digital values which represent the amplitudes of the inputted pair of digital signal series at every time of day as a digital signal. The output signal of the conversion table 5 is introduced to a synchronizing demodulation circuit and also, is inputted to a clock phase error detecting circuit 6 having the function of a timing information detecting means. And the output of a VCO at a clock generating circuit 7 is supplied to A/D converters 3 and 4 as a sampling clock. |
