signal_integrity(1).pdf

Protel 99

Making Electronic Design Easy ™

Eliminate guesswork with board signal

Get it right the first time and take

the guesswork out of board design

by including signal integrity analysis

as part of your design toolbox.

Protel 99’s Signal Integrity

Simulator is seamlessly integrated

with the board layout process,

providing extremely accurate board

analysis. Create rules to check

your whole board for crosstalk,

overshoot/undershoot, flight time

and impedance problems. Minimize

costly post-layout changes and

solve your high-speed design and

EMC/EMI problems before you

take your board to manufacture.

Reduce the design time

with advanced signal

integrity analysis

As PCB designs become more

sophisticated, with higher clock

speeds, higher device switching

speeds, and higher density, the need

to analyze the signal integrity before

the design is manufactured becomes

more pressing. Propagation delays,

net impedances, signal reflections

and crosstalk are no longer just the

domain of the high-frequency design

specialist. Signal integrity problems

can affect all board designs. Device

manufacturers constantly produce

smaller and faster devices with

increasing device edge rates,

and slower logic families are

disappearing from manufacturers’

inventories. It is becoming

increasingly necessary for all

designers to keep signal integrity

issues in mind as they layout

and route their boards.

Protel 99 includes a comprehensive set of signal integrity design rules covering areas

such as net impedance, overshoot, undershoot, flight time and signal slope. Signal

integrity violations are then included as part of the standard board DRC report.

Accurate results from

industry-proven algorithms

Simulator produces accurate

simulations using industry-proven

algorithms.

Protel 99’s Signal Integrity

Simulator accurately models the

behavior of the routed board. It

uses the characteristic impedance

of the traces, determined using

sophisticated transmission line

calculations, and I/O buffer

macro-model information as input

for simulations. Based on a Fast

Reflection and Crosstalk simulator

model, Protel 99’s Signal Integrity

Tight integration with

Protel 99’s PCB Editor

While you can run Protel 99’s Signal

Integrity Simulator at any time to

examine the performance of your

board in detail, tight integration

with Protel 99’s PCB Editor means

you can easily incorporate signal

integrity analysis into the normal

board verification process.

Protel 99 includes a sophisticated

Signal Integrity Simulator that

provides detailed information about

the real-world performance of

your design. Signal integrity test

parameters, such as overshoot,

undershoot, impedance and signal

slope requirements, are specified

as standard PCB design rules. If

the board fails any of the signal

integrity design requirements

during design rule checking, you

can run Protel 99’s Signal Integrity

Simulator to perform full reflection

or crosstalk analyses of the PCB to

pinpoint the problem and examine

possible solutions.

Using Protel 99’s Signal Integrity

Simulator you can find and correct

signal integrity problems before

sending your board to manufacture.

Generate a full signal integrity report for any nets on your board. The report includes

comprehensive impedance and signal condition information for each net.

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integrity simulation

SIGNAL INTEGRITY

Signal integrity design requirements,

such as net impedance, overshoot,

undershoot, flight time and signal

slope can be specified as design

rules within the PCB Editor. When

you perform a Design Rule Check

(DRC) on your board, Protel 99

automatically tests these rules

using the Signal Integrity Simulator

algorithms. Signal integrity

violations are then included as part

of the standard board DRC report.

Simulator includes a powerful Wave

Analyzer that displays the results of

reflection and crosstalk simulations.

The Wave Analyzer shows the

simulation results in a CRO-like

graphical display. You can zoom in

on any portion of a waveform, and

use the versatile measurement tools

to take measurements directly from

the display.

Include signal integrity rules as part

of the board specification process

and you’ll automatically catch

potential problems at the crucial

layout stage, before committing

to prototyping and manufacture.

Explore termination

options

Feature Highlights

Protel 99’s Signal Integrity

Simulator includes a powerful

Termination Advisor that lets

you explore the results of various

termination options before

modifying your board.

The integrated Termination Advisor

allows you to experiment with different

termination options for each connection,

then run a virtual simulation using the

selected termination. Find the optimal

solution before modifying your board.

Well-proven algorithms for

the accurate calculation

of transmission line

characteristics and

simulations

Simple to set up - define

the design requirements

(impedance, overshoot,

undershoot, slope, flight

time, etc) as PCB design

rules

No special expertise is

required, the signal integrity

analysis is launched directly

from the PCB

Perform a design rule check

on the entire design to

quickly identify nets that fail

the requirements

Perform fast simulation

of reflection and crosstalk

effects on selected nets

No knowledge of SPICE

or analog simulation is

required, the Signal

Integrity Simulator uses

I/O buffer macro-models

Oscilloscope type display

of reflection and crosstalk

simulation results with

integrated result

measurement facilities

Quickly examine different

what-if termination options

with the Termination

Advisor

Extensive library of

component models

And because signal integrity

analysis is integrated in the PCB

design rule checking process, you

can use the powerful PCB Editor

browse tools to quickly identify

problem nets. Set the Browse

mode in the PCB Editor Panel to

Violations and you can quickly

locate and display problem nets

with full violation details.

The Termination Advisor allows

you to selectively apply different

termination options for a particular

node. You can then rerun the simula-

tion to compare the effects of the

different options, choosing the best

solutions for your design before

altering your board layout.

Perform accurate

waveform analyses

With Protel 99’s integrated Signal

Integrity Simulator, you'll save time

and money by eliminating signal

integrity and EMC/EMI problems

on your board before prototyping

and manufacture.

To give you the full picture on your

board’s signal integrity performance,

Protel 99’s Signal Integrity

Protel 99’s Signal Integrity Simulator includes a powerful

Wave Analyzer that graphically displays the results of

reflection and crosstalk simulations and allows you to take

measurements directly from the displayed waveforms.

Specifications

Device modelling:

I/O buffer macro-model

Analyses:

Net Screening, Reflection,

Crosstalk

Integration methods:

Trapezoidal, Gear’s Method

(1st, 2nd and 3rd order)

Termination simulations:

Series R, Parallel R to VCC,

Parallel R to GND,

Parallel R to VCC and GND,

Parallel C to VCC,

Parallel C to GND, Parallel

Schottky diodes

Stimulus types:

Single pulse, Constant level,

Periodic pulses

Contact your local sales office today for your FREE Protel99 30-Day Trial CD.

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