| 摘要 |
PURPOSE:To miniaturize the system by shifting a sample point of an inputted reception signal to extract the timing thereby decreasing the circuit scale. CONSTITUTION:Outputs of low-pass filters 19, 20 are given to an output terminal 28 of a timing phase circuit 26 via the 1st and 2nd band pass filters 26-1, 26-2 extracting each timing component from two orthogonal outputs subjected to synchronizing detection, square circuits 26-3, 26-4, an adder 26-5 obtaining each power of each output and adding each, a subtractor 26-7 subtracting an output of the circuit 26-5 and an added output before T(modulation period)/2sec and a sampling circuit 26-8 obtaining every other sampling value sequentially. Further, the timing is extracted by feeding back an output of the circuit 26-8 to an A/D converter 27 to control the converter 27 thereby moving the sampling point of the reception signal inputted to a terminal 13. |
