Inter-device adaptable interfacing clock skewing

Details Inter-device adaptable interfacing clock skewing Inter-device adaptable interfacing clock skewing

2006-03-28

2006-03-28

Tran, Khai (Department: 2637)

Pulse or digital communications

Pulse code modulation

Noise or distortion reduction

C375S354000

Reexamination Certificate

active

07020210

ABSTRACT:
Inter-device adaptable interfacing clock skewing. The invention is operable in either one of both of a transmit mode and a receive mode to perform skewing of a transmitted and/or a received signal. The operational parameters including frequency and phase may be determined during auto detect/auto negotiation, they may be programmed externally, or they may be user selected in various embodiments. A device may include a clock generator, one or more divider, and one or more delay cells internally to the device. If desired, a high frequency clock is generated within the device and then divided down to generate the appropriate clock signal that supports the communication and interaction between multiple devices. Registers and/or pins may be used to select the clock frequency and phase of output clock signals. The present invention supports multiple Ethernet protocols between multiple devices including 10BaseT, 100BaseT, and 1000BaseT.

REFERENCES:
patent: 5208831 (1993-05-01), Ueno et al.
patent: 6088829 (2000-07-01), Umemura et al.
patent: 6483886 (2002-11-01), Sung et al.
patent: 6510473 (2003-01-01), Voit

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