| 摘要 |
<p>A high frequency amplifier (2) for amplifying inputted television signals; a mixer (4) for subjecting the television signals which have been amplified to frequency conversion into intermediate frequency signals; a SAW filter (7) for selecting, out of the intermediate frequency signals, intra-range intermediate frequency signals emerging in a range within a prescribed intermediate frequency band; and an intermediate frequency amplifier (8) for amplifying the intra-range intermediate frequency signals are provided, and wide band detecting means for detecting the intermediate frequency signals inputted to the SAW filter and generating a first AGC voltage is provided to control a gain of the high frequency amplifier with the first AGC voltage. <IMAGE></p> |
