Filter circuit for reducing emi of differential signal
AssigneeASUSTeK COMPUTER INC.
InventorChin-Chun Chiang
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Abstract
A filter circuit for reducing electro magnetic interference (EMI) of a differential signal is disclosed. The circuit includes a first passive component set, a second passive component set, and a third passive component set. The first passive component set has a first input/output side and a second input/output side. The second passive component set is disposed between a positive signal end and a negative signal end of the first input/output side, and the third passive component set is disposed between a positive signal end and a negative signal end of the second input/output side. According to the circuit of the present invention, EMI of the differential signal can be reduced and signal-transmission-speed may not be reduced.
Claims20
A filter circuit, comprising:
- a first passive component set having a first input/output side and a second input/output side, wherein the first input/output side has a first positive signal end and a first negative signal end, and the second input/output side has a second positive signal end and a second negative signal end;
- a second passive component set disposed between the first positive signal end and the first negative signal end;
- and
- a third passive component set disposed between the second positive signal end and the second negative signal end.
A filter circuit, comprising:
- a first passive component;
- a second passive component;
- a third passive component;
- a fourth passive component;
- a first capacitor, wherein one end of the first capacitor is coupled to the first end of the first passive component and the other end of the first capacitor is coupled to the first end of the second passive component via the third passive component;
- and
- a second capacitor, wherein one end of the second capacitor is coupled to the second end of the first passive component and the other end of the second capacitor is coupled to the second end of the second passive component via the fourth passive component.
Dependencies are inferred from the claim text.