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Elementary, Mr. Watson: Controlled Impedance—When ‘Connecting the Dots’ Stops Working

06/11/2026 | John Watson -- Column: Elementary, Mr. Watson
Signal integrity follows physics that are consistent, predictable, and fully explainable. But those rules don’t show up in the schematic. Instead, they live in the electromagnetic fields around the traces, in the stackup, and in the relationship between conductors and their return paths. The authors weren’t claiming black magic; they were calling out how it feels until you learn what’s going on. The fact that they said it more than 30 years ago only reinforces how fundamental and enduring these concepts really are.

Beyond Design: How Signals Survive the Hostile PCB Environment

06/03/2026 | Barry Olney -- Column: Beyond Design
Modern digital signals exhibit behavior more characteristic of RF waveforms than the slow logic transitions of the past. With fast rise times, a PCB is no longer a collection of copper traces, but a distributed electromagnetic system. Successful design isn’t about routing signals anymore; it’s about engineering transmission lines, preserving uninterrupted return‑current paths, and controlling the resonant structures that naturally form within the multilayer PCB.

Navigating the Hidden Hurdles: Mastering Return Path Discontinuities for Robust Signal Integrity

05/26/2026 | Stephen V. Chavez, Siemens EDA and PCEA
In the race toward higher bandwidth, tighter form factors, and faster time-to-market, engineering teams focus heavily on device performance, routing density, and advanced materials. Yet one of the most critical determinants of system success remains largely invisible—and too often underestimated: the integrity of the return path. Signal integrity (SI) failures rarely originate from the signal trace alone. More often, they stem from what designers don’t see—the disruption of the signal’s return path. These disruptions, known as return path discontinuities, are a leading cause of late-stage failures, unexpected EMI issues, and costly respins.

Three Howard University Engineers Launch Trace to Automate PCB Design Workflows

05/12/2026 | Globe Newswire
Trace, an AI software company automating the printed circuit board (PCB) design workflow, has launched out of stealth and is now accepting customers worldwide.

Indium Awarded $3.2 Million DOE Grant to Establish Domestic Gallium Supply Chain

04/28/2026 | Indium Corporation
Indium Corporation announced it has been awarded a $3.2 million grant by the U.S. Department of Energy’s (DOE) Office of Critical Minerals and Energy Innovation (CMEI) to develop a domestic process for recovering high-purity gallium from manufacturing by-products—a critical step toward establishing a secure, domestic supply chain for a material essential to modern defense systems, semiconductors, and advanced electronics.
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