Electro-magnetic interference protection circuit and method...

Details Electro-magnetic interference protection circuit and method... Electro-magnetic interference protection circuit and method...

2005-03-22

2005-03-22

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Transmission line inductive or radiation interference...

C333S181000

Reexamination Certificate

active

06870437

ABSTRACT:
The present invention provides an electro-magnetic interference protection circuit for a clock buffer. The present invention not only uses a ferrite bead that is serially connected with the power source of the clock buffer to protect the clock buffer from electro-magnetic interference. The ferrite bead also connects in parallel with a capacitor to reduce the distortion of a clock signal out-putting by the clock buffer due to the ferrite bead, thereby making the communication devices work properly.

REFERENCES:
patent: 5068631 (1991-11-01), Vince
patent: 6112118 (2000-08-01), Kroll et al.
patent: 6714092 (2004-03-01), Ramesh
patent: 6781431 (2004-08-01), Taito et al.

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