Design and Simulate SerDes Systems

Design and simulate SerDes systems using the SerDes Designer app

High-speed electronic systems suffer from signal degradation caused by various impairments such as impedance mismatch, attenuation, and crosstalk. Using the equalization and gain modulation blocks in the SerDes Toolbox™, you can compensate for the distortions introduced by the lossy channels.

Starting with the SerDes Designer app, you can design the top-level SerDes systems and perform statistical analysis. Use the building blocks and system objects to design, configure, simulate and analyze the SerDes system including the transmitter and the receiver.

Apps

SerDes DesignerDesign and analyze SerDes systems for export to Simulink, MATLAB and IBIS-AMI

Blocks

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DFECDRDecision feedback equalizer (DFE) with clock and data recovery (CDR)
CDRModels a clock data recovery circuit
FFEModels a feed-forward equalizer
CTLEModels continuous time linear equalizer (CTLE)
AGCAutomatically adjusts gain to maintain output waveform amplitude
VGAModels a variable gain amplifier
SaturatingAmplifierModels a saturation amplifier
IBIS-AMI clock_timesRecover SerDes clock time values from custom DFECDR and CDR
PassThroughPropagates baseband signal without modification
Analog ChannelConstruct loss model from channel loss metric or impulse response
ConfigurationConfigure system wide settings in SerDes system model
Eye Diagram ScopeDisplay eye diagram of time-domain signal
StimulusSet pseudorandom binary sequence (PRBS) pattern and number of symbols to simulate in SerDes model

Objects

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serdes.DFECDRDecision feedback equalizer (DFE) with clock and data recovery (CDR)
serdes.CDRPerforms clock data recovery function
serdes.FFEModels a feed-forward equalizer
serdes.CTLEContinuous time linear equalizer (CTLE) or peaking filter
serdes.AGCAutomatically adjusts gain to maintain output waveform amplitude
serdes.VGAModels a variable gain amplifier
serdes.SaturatingAmplifierModels a saturating amplifier
serdes.PassThroughPropagates baseband signal without modification
serdes.ChannelLossCreate simple lossy transmission line model

Functions

optPulseMetricPulse response metric for optimization routines
prbsPseudorandom binary sequence
impulse2stepStep response from impulse response
impulse2pulsePulse response from impulse response
pulse2impulseImpulse response from pulse response
pulse2stateyeStatistical eye from pulse response
pulse2pdaPeak distortion analysis eye from pulse response
pulse2waveData pattern waveform from pulse response
wave2pulsePulse response from data pattern waveform

Topics

Design SerDes System and Export IBIS-AMI Model

This example shows how to use the SerDes Designer app to create and analyze a SerDes system, and create the IBIS-AMI models for the transmitter and receiver from Simulink®.

Fundamentals of SerDes Systems

Basic components that build up a SerDes system.

Clock and Data Recovery in SerDes System

Explore the behavior, control and characteristics of a first order clock data recovery (CDR).

Statistical Analysis in SerDes Systems

Customize and explore the statistical analysis of SerDes systems.

Linux Version Compatibilities

Generate shared objects on compatible Linux versions.

Featured Examples

Convert Scattering Parameter to Impulse Response for SerDes System

Convert Scattering Parameter to Impulse Response for SerDes System

Covers two topics: the first shows how to combine a Scattering-Parameter (S-Parameter) model of a baseband communication channel with an analog transmitter and receiver into a single 4-port S-Parameter. The second shows a possible method to fit a transfer function to the S-Parameter and find its impulse response for use with SerDes Toolbox™ using the functions rational and impulse from RF Toolbox™.

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Find Zeros, Poles, and Gains for CTLE from Transfer Function

Find Zeros, Poles, and Gains for CTLE from Transfer Function

Configure the Specification parameter GPZ Matrix of a CTLE in the SerDes Designer app to use zeros, poles, and gains output by the zpk function, given poles and residues output by the rational function. You can reformat the set of zeros, poles, and gains output by the zpk function to use as a GPZ matrix in a CTLE block.

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Globally Adapt Receiver Components Using Pulse Response Metrics to Improve SerDes Performance

Globally Adapt Receiver Components Using Pulse Response Metrics to Improve SerDes Performance

Perform optimization of a set of receiver components as a system using function optPulseMetric to calculate metrics such as eye height, width and channel operating margin (COM) estimate from a pulse response at a target bit error rate (BER) to evaluate the optimal performance of a particular configuration. The adaptation is performed as statistical analysis (Init), then the optimized result is passed to time-domain (GetWave).

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Globally Adapt Receiver Components in Time Domain

Globally Adapt Receiver Components in Time Domain

Perform optimization of a set of receiver components as a system during Time Domain (GetWave) Simulation. You will see how to setup a CTLE and a DFECDR Block so their settings adapt together globally during simulation. This is a follow on to the example "Globally Adapt Receiver Components Using Pulse Response Metrics to Improve SerDes Performance."

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SerDes Toolbox Documentation

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