| 摘要 |
A compensating circuit for use with attenuators utilises an impedance transformation technique to be applied to determine the values of series and parallel resistance to be used with each coil. Typically the value of the series and parallel resistances are of such a magnitude that the series value is either the same as or greater than the copper loss resistance of the coil, and that the parallel resistance value is the same as or smaller than the iron resistance of the coil. A complete range of impedance transformation relationships are established for two and four pole situations. The advantage claimed for the techniques is that circuits using components with losses may be used without affecting attenuator performance. |
