| US 7,542,534 B2 | ||
| Method and an apparatus to reduce electromagnetic interference | ||
| Gregory L. Ebert, Portland, Oreg. (US) | ||
| Assigned to Intel Corporation, Santa Clara, Calif. (US) | ||
| Filed on Sep. 27, 2005, as Appl. No. 11/237,042. | ||
| Prior Publication US 2007/0071151 A1, Mar. 29, 2007 | ||
| Int. Cl. H04L 7/00 (2006.01) | ||
| U.S. Cl. 375—354 | 8 Claims |
| 1. A method comprising:
using a first clock signal to create a second clock signal having a fundamental frequency lower than a frequency of the first
clock signal, wherein the first clock signal is usable as a time reference for data transmission from a chip within a chip
set to an interconnect;
outputting the second clock signal to the interconnect via a data channel of the chip as a forwarded clock signal;
redistributing signal power to the lower fundamental frequency to reduce electromagnetic interference (EMI) emission from
the chip; and
alternating duty cycles of the second clock signal in consecutive sub-periods within a fundamental period of the second clock
signal.
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