| 摘要 |
PURPOSE:To reduce a noise component and to inexpensively execute more stable carrier reproduction based upon a simple circuit constitution by using a flip flop(FF) circuit so as to extract only phase information in the generation of a control signal for carrier reproduction. CONSTITUTION:A signal outputted from an exclusive OR circuit 12 is inputted to an FF circuit 18. The circuit 18 extracts only a phase information part out of the signal outputted from the circuit 12 and outputs the extracted information to a low pass filter(LPF) 16. In the case of extracting the phase information part in the output waveform (e) from the circuit 12 by the circuit 18, the extraction is discriminated by a timing clock signal. The timing clock signal is generated based upon an output from a clock reproducing circuit which is not shown in the circuit diagram. The flow of a signal outputted from the circuit 18 is the same as a convensional case. |
