| 摘要 |
PURPOSE:To obtain an excellent reception signal even at the time of appearing crosstalk due to an interference wave by separating a reception signal into different bands, comparing power of signals of each band to be separated, and outputting selectively the separated signal in response to the comparison. CONSTITUTION:A reception signal 9 is inputted to BPFs 1, 2 (band pass filters) whose pass bands differ from each other. Outputs of the BPFs 1, 2 are detected by detection circuits 3, 4, each detection output is integrated by integration circuits 5, 6, and the result is inputted to a comparator 7. When an interference wave exists, an integrated voltage of the output of the integration circuit 6 via, e.g. the BPF 2 is larger than the output of the integration circuit 5, a switch circuit 8 is turned on to the position (a) by the output of the comparator 7, and a signal passing through the BPF 1 having no interference wave is used as an output signal. Thus, excellent reception signal is obtained even at the time of appearing crosstalk due to the interference wave. |
