Ransom’sNotes
Ransom Stephens, PhD
© 2020 Ransom Stephens
Training
“Ransom is that teacher,
the one who makes you wish you never left school.
-Andy Martwick, Intel
Meet innovative
challenges, update skills,
and get an edge!
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Conceptual & rigorous, fascinating & useful
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Fit to your schedule: one, two, or three day
intensives, lunch-n-learn seminars or webinars -
whatever you need
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Problem solving and debug skills
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Key insights from the physics of technology and
neuroscience of innovation to prime your
innovation engine
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A comfortable atmosphere that connects the
dots from previous experience to new
technologies
All Training is customized for you and
your team
“Intuitive, clear, and simple explanations were
given for complicated subject matter. Sharp and
witty jester.”
–Kamna Ashu, Qualcomm
Understanding, Debugging,
and Testing
High Speed I/O
For design, manufacturing, and test engineers,
advanced engineering, physics, and math
students
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Expert-level jitter, noise, and crosstalk analysis
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SNDR, TDECQ
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RJ, DJ, DDJ, ISI, SJ, PJ, HPBJ, DCD, BUJ, E/OJ
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Dual-Dirac model, Q-scale, bathtub plots,
and TJ
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Eye height and eye width in NRZ/PAM2
and PAM4 signaling
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Crosstalk analysis with S-params, eye
diagrams, and waveforms
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NEXT, FEXT, ICR, IXT, IMR, ICN, and COM
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High speed enablers: differential signaling and
clock recovery
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PAM4
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Dispersion, skin effect, and inter-symbol
interference
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Thinking in S-parameters: differential/common
signaling, ISI, crosstalk
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Channel evaluation: COM and ERL
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Equalization techniques at the transmitter and
receiver
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Adaptive link training, Tx & Rx FFE, CTLE,
DFE
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High speed metrology, embedding/de-
embedding
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Diagnostic tools
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Serdes and interconnect test techniques
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Using test patterns to diagnose clock
recovery, equalization, and slicer problems
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Oscilloscopes, BERTs, Phase noise
analyzers, VNAs, TDR
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Stressed eye test techniques
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Interference tolerance testing
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Overview of emerging high speed standards:
400 GbE, OIF-CEI 4+, PCIe 2-6, 32+ GFC, etc
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Tutorial on how to find what you need in a
technology standard specification
“Excellent! Interesting, lively, inspiring… full of
quotable wisdom and humour—beautiful!”
– Alan Boulton, Socionext.com
PAM4 Intensive
For design, manufacturing, and test engineers,
summary version available for managers and
executives
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PAM4 challenges in design and test
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Signal-to-noise, jitter, crosstalk, and BER
analysis of PAM4 signals
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Eye compression, RLM, inter-eye skew
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How to calculate, measure, and simulate COM
(channel operating margin)
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Understanding SNDR, TDECQ, COM, and ERL
measurements and options
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Advanced equalization methods
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Skin effect, dispersion, and PCB nuances at
very high data rates
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Adaptive ink training, Tx & Rx FFE, CTLE, DFE,
ADC-based receivers
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Multi-dimensional S-parameters and crosstalk
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Closed eye analysis: effective jitter and noise
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Jitter and noise analysis techniques: tail-fitting,
spectral fitting, aperiodic BUJ, etc
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Embedding and de-embedding channels, noise
sources, equalization, clock recovery, etc
“Lively, fun, informative, ‘real’ ”
–Kevin James, DisplayLink
Signal and Power Integrity
Essentials
For technicians, circuit designers, and advanced
engineering, physics, and math students
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Reflections, termination, and impedance
matching
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Transmission lines, drivers
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Return path
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Timing, parasitics, stubs
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PCB
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Routing, coupling, capacitors
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ESR, ESL, loop inductance, distributed
capacitance
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Split planes
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Crosstalk in microstrip and stripline traces
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Differential signaling design considerations
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Pros and cons of strong or weak coupling
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Delay and skew
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Power integrity
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Ground bounce & power droop
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Simulation: 3D-wave simulation, SPICE, IBIS, AMI
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Project based hands-on simulation training
“..very accessible due to good diagrams and pacing,
and a good information density.”
– Ben Janoff, Cambridge Consultants
Optic Fiber Technology and
Test
For digital and RF engineers transitioning to fiber
optics and silicon photonics, fiber optic
technicians, design, manufacturing, and test
engineers, advanced engineering, physics, and
math students; summary version available for
managers and executives
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Introduction to Optic Fiber Technology
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Optic Fibers as Dielectric Waveguides
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Physical Optics and DWDM
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Optical Transmitters, Amplifiers, and Receivers
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Dispersion
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Advanced Topics in Fiber Optic Technology - The
Future
Neuroscience-based
Innovative Problem
Solving
Guided problem solving sessions guaranteed
to generate new approaches to solving any
problem your company faces, from debugging
to invention to innovation of processes and
results.
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We use neuroscience-based techniques to
guide your team to solutions to any
(solvable) problem--one to three day
sessions for teams of 2-10 people working
on a common project.
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Effective ways to brainstorm and find new
perspectives
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Neural pruning and adopting natural
selection’s innovation techniques
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Enhanced lateral thought
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Understand the neuroscience of what
makes discoveries, creations, and products
good, bad, and/or valuable
High Speed Serial
Technology for
Executives and Managers
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A lunch seminar designed to provide high-level
team members an understanding of the technical
challenges facing their companies
“Content is very dense but [Ransom] managed to
smooth it with such a sense of humour.
I never expected not to fall asleep in such a course.”
– Ana Ruiz