| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter circuit, capable of highly precisely performing carrier regeneration of a modulated signal which can include plural signal modules modulated, in different modulation systems. SOLUTION: A loop filter circuit 134 is provided with a first circuit module for multiplying a phase comparison signal S150 by a prescribed coefficient, so that the phase error correction of a modulating signal can be performed, a second circuit module for multiplying and integrating the phase comparison signal S150 by the prescribed coefficient, so that the frequency error corrections for the modulated signal can be performed, and a third circuit module for generating the smoothed phase comparison signal from the processed result of the first circuit module in a period, when the carrier regeneration of the first module is performed; and for generating the smoothed phase comparison signal from the processed results of the first circuit module and the second circuit module, during a period the carrier regeneration of the second module is being conducted. |
