| 摘要 |
A Chebyshev high-pass filter includes at least two double pi -shaped filter stages (3,4) that are cascaded to each other, each including a first inductor (2a), first capacitor (2b), second inductor (2c), third inductor (2d), second capacitor (2c), and fourth inductor (2f); and at least one additional capacitor (3). In the double pi -shaped filter stage, the first inductor shunt-connected to a signal line, the first capacitor connected in series to the signal line, and the second inductor shunt-connected to the signal line are connected in this order, and a serially-connected circuit including the third inductor, the second capacitor, and the fourth inductor is connected in parallel to the first capacitor. The additional capacitor is connected between the connection point between the second capacitor and the fourth inductor in an upstream double pi -shaped filter stage and the connection point between the third inductor and the second capacitor in an adjacent downstream double pi -shaped filter stage. <IMAGE>
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