Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Reexamination Certificate
2007-01-30
2007-01-30
Barnie, Rexford (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
C326S021000, C326S026000, C326S030000, C326S031000, C326S086000, C326S090000, C341S161000
Reexamination Certificate
active
10937000
ABSTRACT:
In one embodiment, a decision feedback equalizer helps mitigate intersymbol interference in a bi-directional signaling environment. In the particular embodiment, the decision feedback equalizer includes a voltage-to-current converter to source a received differential current to first and second node, a latch to provide logic signal when comparing currents sourced to the first and second nodes, a memory unit to store the logic signals, and a mapping circuit to source first and second feedback currents to the first and second nodes. This embodiment further includes a transmitter to transmit data over a transmission line during receiving, and a digital-to-analog converter to provide a differential current to the first and second nodes to substantially cancel that part of the received differential currents contributed by the transmitter. In this embodiment, the mapping circuit may comprise a lookup table to map the stored logic signals into code words, and another digital-to-analog converter to source differential current to the first and second nodes in response to the code words. Other embodiments are described and claimed.
REFERENCES:
patent: 6181268 (2001-01-01), Miyake et al.
patent: 6307497 (2001-10-01), Leung et al.
patent: 2004/0130469 (2004-07-01), Casper
patent: 2005/0057387 (2005-03-01), Janakiraman et al.
Lee, Tai-Cheng et al., “A 125-MHz Mixed-Signal Echo Canceller for Gigabit Ethernet on Copper Wire”, IEEE Journal of Solid-State Circuits, vol. 36, No. 3, pp. 366-373, Mar. 2001.
Zerbe, Jared L. et al., “Equalization and Clock Recover for a 2.5-10-Gb/s 2-PAM/4-PAM Backplane Transceiver Cell”, IEEE Journal of Solid-State Circuits, vol. 38, No. 12, pp. 2121-2130, Dec. 2003.
Casper Bryan K.
Jaussi James E.
Barnie Rexford
Intel Corporation
White Dylan
Yadav Ram P.
LandOfFree
Decision feedback equalizer with bi-directional mode and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Decision feedback equalizer with bi-directional mode and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Decision feedback equalizer with bi-directional mode and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3728968