Importance

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Abstract

Described embodiments include a circuit for filtering electromagnetic interference (EMI) that includes an electrically conductive housing enclosing the circuit, a first power terminal providing a first signal, and a second power terminal providing a second signal, the first and second signals forming a differential power input. A filter circuit provides a common mode noise cancelling signal at an output responsive to first and second inputs. An inductive choke has first and second coils that are magnetically coupled. The first coil is coupled between the first power terminal and a first converter input. The second coil is coupled between the second power terminal and a second converter input. A third capacitor is coupled between the filter output and the second power terminal. A fourth capacitor is coupled between the first power terminal and the second power terminal, and an inductor is coupled between the housing and a ground terminal.

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First Claim