Texas Instruments Corporation

Kandou Labs, S.a.

Richard D Simpson

Ali Hormati

Amin Shokrollahi

Roger Ulrich

Brian Holden

Iain Craig Robertson

Karl M Guttag

Michael D Asal

Andrew Kevin John Stewart

John D Keay

Peter Hunt

John Fox

Giuseppe Surace

Jeffrey L Nye

Anant Singh

Armin Tajalli

Graham B Short

James G Littleton

Brendan Walsh

Derek Roskell

Erick D Oakland

Jerry R Van Aken

Anthony M Balistreri

Philip John Moyse

Robert J Gove

Keith Balmer

Thomas A Dye

Michael Stephen Harwood

Neil Tebbutt

Thomas Preston

Omid Talebi Amiri

Jonathan Paul Milton

John Sharkey

Ian J Sherlock

Gary L Swoboda

Robert Floyd Payne

William Robert Krenik

Simon D Forey

Nicholas K Ing-Simmons

Anthony Martin Hill

Bhavesh G Bhakta

Ruediger Kuhn

Henry T Yung

Louis J Izzi

Andrew Keith Joy

Amarjit Singh Bhandal

Chenwei J Yin

Carrell R Killebrew, Jr

Phillip Moyse

Robert Simpson

Richard Ward

Andre J Guillemaud

Graham McLeod Barr

Mike Asal

Jonathan Jeacocke

Peter Heame

Eugenia Carr Cordero Crespo

Eugenia Carr

Mike Harwood

Graeme Swanson

David Collins

Konstantinos Venos

Laura Dudbridge

Andrew J Guillemaud

Laura Simmonite

Graham M Barr

A pair of ground planes arranged in parallel, a dielectric medium disposed in between the pair of ground planes, and a set of at least four signal conductors disposed in the dielectric medium, the set of at least four signal conductors having (i) a first pair of signal conductors arranged proximate to a first ground plane of the pair of ground planes and (ii) a second pair of signal conductors arranged proximate to a second ground plane of the pair of ground planes, each signal conductor of the set of at least four signal conductors configured to carry a respective signal corresponding to a symbol of a codeword of a vector signaling code.

Methods and systems for high bandwidth communications interface

Methods and systems are described for generating two comparator outputs by comparing a received signal to a first threshold and a second threshold according to a sampling clock, the first and second thresholds determined by an estimated amount of inter-symbol interference on a multi-wire bus, selecting one of the two comparator outputs as a data decision, the selection based on at least one prior data decision, and selecting one of the two comparator outputs as a phase-error decision, the phase error decision selected in response to identification of a predetermined data decision pattern.

Clock data recovery with decision feedback equalization

Generating, during a first and second signaling interval, an aggregated data signal by forming a linear combination of wire signals received in parallel from wires of a multi-wire bus, wherein at least some of the wire signals undergo a signal level transition during the first and second signaling interval; measuring a signal skew characteristic of the aggregated data signal; and, generating wire-specific skew offset metrics, each wire-specific skew offset metric based on the signal skew characteristic.

Method for measuring and correcting multi-wire skew

Methods and systems are described for obtaining a plurality of BER-specific correction values by comparing a first set of BER values obtained by sampling, at a sampling instant near the center of a signaling interval, a non-DFE corrected received signal with a second set of BER values obtained by sampling a DFE-corrected received signal at the sampling instant. A set of eye-scope BER measurements are obtained, each eye-scope BER measurement having a sampling offset relative to the sampling instant, a voltage offset value representing a voltage offset applied to alter a decision threshold, and an eye-scope BER value. A set of DFE-adjusted eye-scope BER measurements are generated by using BER-specific correction values to adjust the voltage offset values of the eye-scope BER measurements.

Decision feedback equalization correction of eye scope measurements

Vector signaling codes providing guaranteed numbers of transitions per unit transmission interval are described, along with methods and systems for their generation and use. The described architecture may include multiple communications sub-systems, each having its own communications wire group or sub-channel, clock-embedded signaling code, pre- and post-processing stages to guarantee the desired code transition density, and global encoding and decoding stages to first distribute data elements among the sub-systems, and then to reconstitute the received data from its received sub-system elements.

Clock-embedded vector signaling codes

Methods and systems are described for receiving, over a plurality of consecutive signaling intervals, a plurality of codewords, each codeword received as a plurality of symbols via wires of a multi-wire bus, the plurality of symbols received at a plurality of multi-input comparators (MICs), wherein each symbol is received by at least two MICs, generating, for each codeword, a corresponding linear combination of the received symbols, generating a plurality of composite skew measurement signals over the plurality of consecutive signaling intervals, each composite skew measurement signal based on samples of one or more linear combinations, and updating wire-specific skew values of the wires of the multi-wire bus, wherein one or more wire-specific skew values are updated according to composite skew measurement signals associated with linear combinations formed by at least two different MICs.

Method and system for calibrating multi-wire skew

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Bedford, United Kingdom

Richard D Simpson