Advanced Link Analyzer: User Guide

ID 683448
Date 4/27/2022
Public

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2.1.4.1. Jitter/Noise Setting

Advanced Link Analyzer provides extensive jitter and noise modeling and configuration capabilities. The receiver intrinsic jitter and noise types are categorized in the following table. You can configure each jitter and noise type by clicking Receiver Jitter Options, which leads to the Receiver Jitter/Noise Configuration window.

Advanced Link Analyzer uses a flat jitter/noise structure that assumes no overlapping among the jitter and noise components. Avoid double counting when inputting or importing jitter/noise figures. In the following figure, DJ contains DCD, ISI, PJ, and BUJ. This implies that when you specify DCD and BUJ, the DJ should not be used or the DJ figure should not contain any DCD and BUJ components.

Table 14.  Receiver Intrinsic Jitter and Noise Types

Name

Description

Unit

Support in Advanced Link Analyzer

Comments

DJ

Deterministic Jitter

UI

Yes

You can generate the receiver DJ by using a uniform distribution, dual-Dirac, or truncated Gaussian method. You can select the DJ generation method in the Receiver Jitter/Noise Configuration Window. The default receiver DJ method is dual-Dirac.

BUJ

Bounded Uncorrelated Jitter

UI

Yes

Same as receiver’s Deterministic Jitter. The default method is Uniform distribution. You can select the BUJ generation method in the Receiver Jitter/Noise Configuration Window.

RJ

Random Jitter

UI-RMS or

ps-RMS

Yes

RJ is assumed to be Gaussian. You can specify the receiver RJ in eighth pico-second (ps-RMS) or unit-interval (UI-RMS).

DN

Deterministic Noise

mV

Yes

You can generate the receiver DN by using a uniform distribution, dual-Dirac, or truncated Gaussian method. You can select the DN generation method in the Receiver Jitter/Noise Configuration Window. The default DJ method is uniform.

BUN

Bound Uncorrelated Noise

mV

Yes

Same as receiver DN above. The default method is Truncated Gaussian method. You can select the BUN generation method in the Receiver Jitter/Noise Configuration Window.

RN

Random Noise

mV-RMS

Yes

RN is assumed to be Gaussian.

Jitter PDF

Jitter Probability Density Function (PDF)

Jitter amplitude, Probability (Jitter amplitude can be in absolute time or UI (unit interval) unit)

Yes

Jitter PDF defines the jitter probability density function. The input format is jitter amplitude in second and probability. The following is a jitter PDF example:

-5e-12 1e-10

-4e-12 3e-7

-3e-12 1e-4

-2e-12 1e-2

-1e-12 0.29

0 0.4

1e-12 0.29

2e-12 1e-2

3e-12 1e-4

4e-12 3e-7

5e-12 1e-10

Noise PDF

Noise Probability Density Function

Noise amplitude, Probability

Yes

Noise PDF defines the noise probability density function. The input format is Noise amplitude in volt and probability. The following is a noise PDF example:

-50e-3 1e-10

-40e-3 3e-7

-30e-3 1e-4

-20e-3 1e-2

-10e-3 0.29

0 0.4

10e-3 0.29

20e-3 1e-2

30e-3 1e-4

40e-3 3e-7

50e-3 1e-10

InpN

Input Referred Noise

V2/GHz

Yes (Except IBIS-AMI model and IBIS-AMI wrapper model)

Receiver input referred noise is specified as one-sided noise spectral density in the unit of V2/GHz. It produces receiver-setting dependent noise figure for link margin calculation.

Figure 46.  Advanced Link Analyzer Receiver Jitter/Noise Configuration Window

Clock path receiver uses the same jitter/noise configuration method as the data path receiver.

Figure 47. Specifying Clock Path Receiver Jitter/Noise

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