| 摘要 |
PURPOSE:To exactly execute automatic channel selection, by providing an automatic channel selection stop signal generator on only a receiving system whose antenna gain is highest, among plural receiving systems, and constituting it so that an automatic channel selection stop signal is applied to a local oscillation signal generator of a tuner of all the receiving systems. CONSTITUTION:An automatic channel selection stop signal generating circuit 10 is provided on an intermediate frequency amplifying stage 5a of a receiving system (a) whose antenna gain is highest, among plural receiving systems. A diversity switching signal outputted from a comparing circuit 9 operates so as to switch only a sound signal switching circuit 7. Also, an automatic channel selection stop signal is fetched from one automatic channel selection stop signal generating circuit 10, and is applied to a common local oscillation stage. In this regard, (b) denotes a receiving circuit system. |
