Signal Integrity

High-Speed Digital Design & Signal Integrity Services

Ensure High-Speed Reliability from the Ground Up

As data rates rise in modern embedded systems, signal integrity (SI) and power integrity (PI) become critical to ensure your product performs as expected — without jitter, crosstalk, or EMI issues.

Promwad offers specialised services in high-speed PCB design and signal integrity simulation to help clients avoid costly respins, achieve compliance, and reach optimal performance in interfaces like DDR, PCIe, USB, HDMI, and Gigabit Ethernet.

Our Signal Integrity Services

We work closely with your hardware and system design teams to ensure high-speed performance at every stage.

Pre-Layout Simulation & Design Guidelines

Transmission line analysis and impedance strategy
Stackup definition and material selection (FR-4, Rogers, etc.)
Topology selection for DDRx, SerDes, and LVDS

PCB Layout Review and Optimisation

Differential pair routing optimisation, length matching, via minimisation
Crosstalk and return path integrity review
Power delivery network (PDN) decoupling analysis

Post-Layout Signal & Power Integrity Analysis

Simulations with IBIS models and components' S-parameters
SI/PI co-simulations
Eye diagram and time domain reflection analysis

Compliance and Test Support

Design for EMC/EMI compliance (CISPR, FCC, CE)
Controlled impedance PCB manufacturing support
Lab support for scope-based signal quality validation

Typical Interfaces We Support

We adapt simulations and layout recommendations to your application — whether it’s industrial, telecom, automotive, or consumer electronics.

DDR3/DDR4/DDR5

Data Rates: Up to 6.4 Gbps
SI Challenges Addressed: Reflections, skews, power noise

PCIe Gen 3/4/5

Data Rates: Up to 32 GT/s
SI Challenges Addressed: Crosstalk, jitter, loss compensation

Gigabit Ethernet

Data Rates: 1–40 Gbps
SI Challenges Addressed: Return loss, differential impedance

USB 3.1/3.2/4

Data Rates: Up to 40 Gbps
SI Challenges Addressed: Stub length, connector modeling

HDMI / MIPI / LVDS

Data Rates: Multi-Gbps
SI Challenges Addressed: Eye closure, crosstalk, skew balancing

Our Workflow

Whether you’re integrating a new high-speed interface or debugging SI issues on an existing board, we support you from design to verification.

1.Requirements Gathering

Identify key interfaces, length constraints, stackup limits

2.Simulation Strategy

Define models, simulations, and design rules for SI/PI

3.Layout Collaboration

Work with your layout team or provide full PCB layout

4.Validation & Test

Provide simulation reports, compliance support, and lab testing

Why Promwad?

We bring simulation accuracy and layout discipline to every high-speed interface.

Simulation expertise

HyperLynx, Sigrity, Altium PDN Analyzer, Ansys

Multilayer board design

8+ layer stackups, HDI, rigid-flex

Industry-specific experience

telecom switches, embedded vision, vehicle gateways

Manufacturing alignment

controlled impedance PCB production with vetted EMS vendors

Start with Signal Integrity in Mind

Signal integrity is not just for aerospace and telecom — it’s essential for any system running at multi-GHz speeds.

Promwad provides complete SI and high-speed PCB design services to help your product meet reliability and performance targets — the first time.

Let’s simulate, verify, and deliver your next high-speed design.

Drop us a line about your project! We will contact you today or the next business day. All submitted information will be kept confidential.