Patent ID: 7459995
Filing Date: 2008-12-02
Classification: H02H,H02M,H03H,H04B

Abstract:
1. A noise suppression circuit suppressing normal mode noise transmitted on first and second conductive lines and generating a potential difference between the first and the second conductive lines, comprising: first and second inductors inserted in series in the first conductive line and magnetically coupled to each other; and a series circuit configured to have a third inductor and a first capacitor connected in series, one end of the series circuit being connected to a junction of the first and second inductors, and other end being connected to the second conductive line, wherein a coupling coefficient k between the first and second inductors is smaller than 1, and the inductance of the third inductor is set to a value so that a desired noise attenuation characteristic is realized on condition that the coupling coefficient k is smaller than 1.