| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a receiving apparatus whose constitution is simple and by which a wide-band signal can be received. SOLUTION: When a signal in a band of, e.g. 100 to 340 MHz is received, the band of the signal is divided into signals in four systems with bands of 100 to 280 MHz, 120 to 300 MHz, 140 to 320 MHz and 160 to 340 MHz, The signals are guided to frequency converters C1 to C4 with frequency droop amounts of -90, -110, -130 and -150 in this order from the low-frequency side. Therefore, dropped signals are given to band-pass filters 11, 12, 13 at 20±10, 100±10 and 180±10 MHz, and their bands are divided further so as to be given to A/D converters 2-1, 2-2, 2-3.</p> |
