In the field of PCB design, impedance is the key factor determining whether signals can be transmitted stably. Many engineers have encountered issues such as signal reflection and crosstalk due to neglecting impedance matching, leading to repeated debugging of products. In fact, as long as you grasp the core logic of impedance calculation, you can … Read more
In PCB design, removing via annular pads on non-functional connection layers (i.e., no annular design) to enhance routing and signal integrity is a precision technique that requires careful consideration. The table below summarizes its core advantages and disadvantages, helping you quickly establish an understanding. Dimension Advantages of No Annular Design (Benefits) Challenges and Risks of … Read more
The standard design process that PCB (Printed Circuit Board) engineers must master is crucial for ensuring the performance, reliability, and manufacturability of circuit boards. Below is a phased outline of the standard design process and its core points: 1. Requirement Analysis and Preliminary Preparation Clarify Design Objectives Define circuit functions and performance indicators (such as … Read more
Author Author Barry Olney is the Executive Director of In-Circuit Design Pty Ltd (iCD) in Australia. The company specializes in PCB design services and focuses on circuit board-level simulation technology. The iCD Design Integrity software developed by the company integrates iCD Stackup, PDN, and CPW Planner. This software can be downloaded from www.icd.com.au. The layout … Read more
In the rapid development of 5G communication, millimeter-wave radar, and IoT devices, the design quality of RF PCBs, which are the core of signal transmission and processing, directly determines the performance boundaries of the entire system. Once regarded as a ‘black art’ reliant on experience, RF design often required engineers to go through repeated trial … Read more
Documenting work, sharing experiences, and open-sourcing! Speed up! Committed to ensuring that every step of our design is theoretically supported! Bookmark and follow to progress together. Please pay attention to the comments section, as some colleagues will discuss and supplement there, enriching this theoretical library together! Today, I will share an essential skill for high-speed … Read more
A clear and in-depth analysis of the core rules in high-speed circuit design In high-speed PCB design, differential signal technology has become a key means to enhance signal quality. From commonly used USB interfaces and HDMI high-definition transmission to complex network communication devices, the application of differential signals is ubiquitous. However, one question often troubles … Read more
Deepen your understanding of the mysteries of high-frequency signal transmission to make your PCB design more professional. In everyday electronic devices, from smartphones to routers, from microwave ovens to radar, high-frequency signals are ubiquitous. However, as the signal frequency increases, their transmission methods on PCBs undergo remarkable changes. Today, we will unveil the mysteries of … Read more
Introduction: The PCB expert, known as ‘Water-like Man’ (with over 20 years of industry experience and a former senior technical executive at Huawei’s R&D department), previously introduced the focus on signal integrity (SI) issues in matching circuit design. This issue mainly discusses some misunderstandings in high-speed PCB design regarding high-speed signals. Water-like Man provides suggestions … Read more
1. The Core Role of Surface Treatment Processes First, it is important to understand why surface treatment is necessary: Preventing Copper Oxidation: Bare copper is highly susceptible to oxidation in the air, and the resulting copper oxide can severely damage solderability. Providing a Solderable Layer: It provides a good soldering surface for the connection between … Read more