Circuit Simulation and PCB Design: Based on Multisim 10 and Protel DXP 2004 – Page 221
Some screenshots of electronic books 【Complete Set of Hardware Learning Materials Collection】
PCB design
In-Depth Analysis of Industrial Controller PCB Design and SMT Processing: Data, Yield, and Cost
In the field of industrial automation, the design and SMT processing of industrial controller PCBs are critical factors that determine product performance, quality, and cost. A deep understanding of the data details, yield influencing factors, and cost composition is essential for companies to optimize production and enhance competitiveness. 1. Specific Data of PCB Design (1) … Read more
How to Develop a BLE Chip
What? Why do we say “develop”? It’s because it really is a competitive field!For many low-end BLE chips, the main function is simply wireless connectivity; being able to connect and transmit a few data packets is sufficient. Some even do not require a connection, as they can scan and advertise.So what is the biggest cost … Read more
Open Source Sharing: A Guide to Creating a Four-Layer Board with Allwinner H3, from Learning Allegro to Running Linux
Sharing an article from an expert, covering everything from PCB design to layout, and finally getting Linux to run. Let’s learn together! Author: laplace After learning Allegro, I always wanted to design a board, create the schematic, layout it myself, and finally get Linux running. I also wanted to learn a bit of Linux, and … Read more
Tombstone Defects on PCBs
Tombstone defects on PCBs, also known as the Manhattan Bridge or bridge effect, are a type of assembly defect for surface-mounted (passive) components. This defect occurs due to inconsistent melting times of solder paste at both ends of the component, leading to uneven stress on the component. Given that these components are relatively light, they … Read more
Industry Jargon in PCB Design and Manufacturing (Part 1)
Test Coupon: Commonly known as Impedance Strip The Test Coupon is used to measure the characteristic impedance of the produced PCB using a TDR (Time Domain Reflectometer). The impedances that need to be controlled generally include single-ended lines and differential pairs, so the trace width and spacing (when differential pairs are present) on the test … Read more
Understanding Dirty Signals in PCB Design
I have a demo board with an integrated MOSFET Buck power supply. Although the circuit is simple, the layout is quite textbook-like. Here are some key design points of this circuit: 1. Phase Plane The phase plane, which is the plane connecting the inductor and the power IC, is the dirtiest signal (high current, high … Read more
Design Considerations for PCB Process Edges
When performing SMT (Surface Mount Technology) processing on PCBs, the PCBs are conveyed along the SMT production line via guide rails. Therefore, a pair of edges must be reserved as forbidden areas for component placement. Typically, the two long edges of the PCB or the assembled panel are designated as the conveyance edges. The width … Read more
PCB Design Checklist: Routing
Route according to the 50-ohm impedance line width, try to route from the center of the pad, keeping the lines straight and preferably on the top layer. When a bend is necessary, make it at a 45-degree angle or as an arc, preferably bending near capacitors or resistors. If routing meets the matching requirements of … Read more
Factors Affecting Loss in PCBs
Editor’s Note: The content of this article is quite concise. The first two factors are introduced using ADS simulation schematics, and those interested can follow along. Many buses have requirements for loss, so for design engineers, it is essential to understand which factors dominate the changes in loss. We often discuss the issue of loss … Read more