PCB design

Xiangteng NPU Chip (4) – Core Board Hardware Design Reference Materials Summary

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Xiangteng NPU Chip (4) - Core Board Hardware Design Reference Materials Summary

The Xiangteng NPU chip HKN201 neural network processor is a domestically produced, high-performance, multi-core processor designed for strong real-time, high-performance, and high-concurrency application scenarios by Xi’an Xiangteng Microelectronics Technology Co., Ltd.The hardware design of the HKN201 neural network processor core board requires reference documents including the hardware design guide, core board hardware schematic reference, schematic … Read more

Why Does the Circuit Board Make a ‘Ticking’ Sound?

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Why Does the Circuit Board Make a 'Ticking' Sound?

After the delivery of a previous design project, due to an operational error by the on-site debugging personnel, the exposed wire ends touched the circuit board (which was coated with a conformal coating) when the rear panel of the device was opened, ultimately causing a short circuit. The feedback from the site indicated that the … Read more

How to Efficiently Disassemble a PCB Circuit Board?

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How to Efficiently Disassemble a PCB Circuit Board?

In the process of developing and producing electronic products, one may encounter the scenario of needing to disassemble an existing PCB circuit board to analyze the circuit layout, component selection, and signal routing. Below, we will discuss an efficient process for disassembling a PCB circuit board, which we hope will be helpful to everyone. 1. … Read more

How to Design Circuit Boards for Electromagnetic Interference Immunity?

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How to Design Circuit Boards for Electromagnetic Interference Immunity?

The basic task of interference immunity design is to ensure that the system or device does not malfunction or lose functionality due to external electromagnetic interference, and does not emit excessive noise interference to avoid affecting the normal operation of other systems or devices. Therefore, improving the system’s interference immunity is also an important aspect … Read more

The ‘Pseudo Eight-Layer’ Design in PCB Stacking

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The 'Pseudo Eight-Layer' Design in PCB Stacking

In PCB (Printed Circuit Board) design, factors such as signal transmission stability and impedance matching are typically considered. Choosing the appropriate stacking scheme is crucial to meet design requirements. In certain cases, especially when designing six-layer boards, a special design scheme known as ‘pseudo eight-layer’ may be adopted. The ‘pseudo eight-layer’ actually refers to a … Read more

How to Place Capacitors in PCB Design?

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How to Place Capacitors in PCB Design?

Capacitors play a crucial role in high-speed PCB design and are typically the most used components on a PCB. In PCBs, capacitors are generally categorized into filtering capacitors, decoupling capacitors, and energy storage capacitors. 1. Power Output Capacitors, Filtering Capacitors We usually refer to the capacitors in the input and output circuits of the power … Read more

Parameters Related to PCB Pad Design Process

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Parameters Related to PCB Pad Design Process

1. Purpose Standardize the PCB pad design process for products, specifying the relevant parameters of the PCB pad design process, ensuring that the PCB design meets the technical specifications for manufacturability, testability, safety regulations, EMC, EMI, etc., and building the process, technology, quality, and cost advantages of the product during the design process. 2. Scope … Read more

Basic Operations and Considerations for Exporting Gerber Files in PCB Design (Part 1)

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Basic Operations and Considerations for Exporting Gerber Files in PCB Design (Part 1)

Previously, I wrote an article on my blog titled “Why Convert PCB Files to GERBER Files and Drill Data for PCB Manufacturers”. That article simply explained why this is necessary. In this article, I will discuss how to convert PCB design files into the corresponding Gerber files and some common pitfalls to avoid. Many engineers … Read more

Should the GND (Guard Ground) in PCB Traces Be Retained?

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Should the GND (Guard Ground) in PCB Traces Be Retained?

Previously, we discussed various aspects of crosstalk, including its sources, formation, types, simulation, and testing methods. We also introduced some methods to reduce crosstalk, one of which is to protect important signal networks with ground networks. This additional ground network is commonly referred to as a guard trace, as shown in the figure below: Can … Read more