| 摘要 |
PURPOSE:To form the delay line taking the trap frequency as the cut-off frequency, in common use with LPF, by adjusting the mutal inductance between coils clipping the grounding line forming the capacitance. CONSTITUTION:A series of signal line 10 is wound on each slot of the bobbin and the grounding line 11 is wound on the groove 12 to form the capacitance C. To weaken the coupling of the signal lines on the grooves 13, 14, the inductance required to delay the signal is wound shared in the grooves 13 and 15. This applies to the grooves 14 and 16. Thus, the mutual inductance between the coils of the grooves 13, 15 and the grooves 13, 16, can be adjusted to an arbitrary value. Where the sum of the inductances of the coil of the grooves 13, 15 and that of the grooves 14, 16 is L and the mutual inductance between the coils clipping the grounding line is L', the signal lines are wound so that the frequency (wo) of the trap signal can satisfy the equation 1. Thus, the delay line taking the frequency (wo) as the cut-off frequency and in common use with LPF can be formed. |
