| 摘要 |
PURPOSE:To control the title receiver in accordance with the S/N of correlative demodulated signals by providing a path with an integration circuit and another path without integration circuit and switching the two paths to each other depending upon a comparing result of a comparator circuit which compares the signal level of an inputted correlative demodulated signal with that of a reference signal. CONSTITUTION:A reference voltage E is set at a level at which it is discriminated that the S/N of correlative demodulated signals is high and, when a correlative demodulated signal exceeding the level is inputted to an input (e), the signal is not passed to an integration circuit 2, but simply passed as a PDI output (g) by means of switch circuits 3 and 4 based on a signal (b) from a control circuit 1. When it is discriminated that the S/N of the correlative demodulated signals is worse, the switch circuits 3 and 4 cut off the path (e) and connects another path (d). Accordingly, the correlative demodulated signals are inputted to the integration circuit 2 and, as a result, the PDI output (g) is obtained. |
