NOISE SUPPRESSING CIRCUIT

摘要

A noise suppressing circuit capable of suppressing noise in a wide frequency range even if any impedance variation occurs on an input or output side. The noise suppressing circuit includes first and second inductors (L1,L2) that are inserted in series with a first conductive line (3), and also includes a series circuit (15) comprising a third inductor (L3) and a first capacitor (C1) that are connected in series with each other, the third-inductor side of the series circuit (15) being connected to a node between the first and second inductors (L1,L2). The noise suppressing circuit further includes a second capacitor (C2) one end of which is connected to the first conductive line (3) on the side of the first inductor (L1) and the other end of which is connected to a node between the third inductor and first capacitor of the series circuit (15).