Modular connector with suppression of conducted and radiated...

Details Modular connector with suppression of conducted and radiated... Modular connector with suppression of conducted and radiated...

2008-03-25

2008-03-25

Ham, Seungsook (Department: 2817)

Wave transmission lines and networks

Transmission line inductive or radiation interference...

C333S181000, C439S620050, C439S620230

Reexamination Certificate

active

11196658

ABSTRACT:
An RJ 45 connector for unshielded CAT5 cable has electromagnetic-interference-suppression circuitry to meet the Class B conducted and radiated emissions standard. The connector comprises, in addition to signal-conditioning transformers, a current-blocking ferrite and a plurality of pairs of common-mode filters, one pair for each conductor of each active twisted pair of the cable. Each pair of filters is connected in series with each other between a conductor of an active twisted pair and a transformer winding, and meets or exceeds the impedance, reactance, and resistance curves of FIGS.2-4. The ferrite is connected in series with each conductor of each inactive pair of the cable and across a capacitor to ground, and meets or exceeds the impedance, reactance, and resistance curves of FIGS.5-7.

REFERENCES:
patent: 5971813 (1999-10-01), Kunz et al.
patent: 6171152 (2001-01-01), Kunz
patent: 6227911 (2001-05-01), Boutros et al.
patent: 6334787 (2002-01-01), Chang
patent: 6663423 (2003-12-01), Belopolsky et al.
patent: 6881096 (2005-04-01), Brown et al.
patent: 7123117 (2006-10-01), Chen et al.
patent: 2004/0164619 (2004-08-01), Parker et al.

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