| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a demodulator capable of stably reproducing clocks. <P>SOLUTION: A digital demodulating section 20 includes a multiplier 21 and a multiplier 22 each for converting a received signal into a baseband signal, and a carrier removing circuit 26 for removing carrier components from the baseband signal. A zero-crossing determination circuit 29 detects a zero-cross point of a signal to be inputted. An out-of-synchronization detecting circuit 31 detects a deviation of synchronization with the carrier in the baseband signal, and switches a signal inputted into the zero-crossing determination circuit 29 between a signal before removing the carrier component and a signal after removing the carrier components at the carrier removing circuit 26, depending on the deviation of synchronization detected by the out-of-synchronization detecting circuit 31. <P>COPYRIGHT: (C)2011,JPO&INPIT |
