| 摘要 |
A corrective network for obtaining a desired overall frequency response comprises a plurality of tunable, non-active resonant circuit stages, each connected with a source and operative for modifying the frequency response over a respective portion of the frequency spectrum. Each resonant stage comprises a variable differential capacitor having a rotor plate terminal and two stator plate terminals. Each stage further includes a series circuit branch constituted of a resistor and an inductor which has one end which is connected to the respective rotor terminal of each stage. The network further includes a common terminal at which the other ends of the series circuit branches are all connected. The source may be a transformer having a tap intermediate its end terminals, and an output impedance is located between the common terminal and the tap of the transformer. The stator plate terminals of at least some of the stages are connected to respective ones of the end terminals of the source. |
