| 摘要 |
PROBLEM TO BE SOLVED: To make the tuner small-sized and low-priced by decreasing the number of transformers used for a tuning circuit. SOLUTION: This two-band tuner is equipped with a 1st tuning circuit 7 having a 1st coil 1b, a 1st varactor diode 3, and a 2nd varactor diode 4, and the 1st varactor diode 3 has a larger maximum capacity value than the 2nd varactor diode 4 and also has a larger minimum capacity value than that of the 2nd varactor diode 4 and the 1st varactor diode 3 or 2nd varactor diode 4 is connected selectively to the 1st coil 1b in parallel.
|
