| 摘要 |
PURPOSE:To improve the connection among an AM input tuning section, a succeeding receiver main circuit and an FM input section, by using in common a tracking correction capacitance for an input tuning circuit as a coupling capacitor to an FM input signal. CONSTITUTION:A tracking correction trimmer capacitor 16 for an input tuning circuit is used in common as an FM signal coupling capacitor. An FM signal line/AM tuning voltage supply line is used in common with an AM signal line. At the FM reception, an input signal is connected to an output tap of an input tuning transformer 3 via the capacitor 16, drawn in a receiver 15 with an extension cable 9, and connected to an FM input tuning stage through an FM separation coil 4. Further, the tuning voltage at AM reception is connected to a signal line in common use with FM and AM in the receiver and applied to a varactor diode 6 via the secondary side of a transformer 3. |
