The termination resistor for the CAN bus is generally 120 ohms. In fact, during design, it consists of two 60 ohm resistors connected in series. There are typically two nodes of 120Ω on the bus, which is a well-known fact for anyone with a basic understanding of the CAN bus. However, as someone who struggles … Read more
1. PCB Layout 1. Follow the layout principle of “big first, small later, difficult first, easy later”, meaning that important unit circuits and core components should be prioritized in the layout. 2. The layout must refer to the schematic diagram and place components according to the signal flow rules of the schematic. 3. The arrangement … Read more
01 Power Layout and Wiring Digital circuits often require non-continuous current, which can cause surge currents in some high-speed devices. If the power routing is long, the surge current can lead to high-frequency noise, which can then couple into other signals. In high-speed circuits, parasitic inductance, parasitic resistance, and parasitic capacitance are inevitable, so this … Read more
PCB Network News Optical modules have gained prominence in high-speed communication due to their ability to convert optical signals. The design of their PCB mainboard must meet special requirements such as high-speed transmission, heat dissipation, mounting, and hot-swapping, making it different from ordinary PCBs. The PCB of optical modules is a key component for achieving … Read more
(1) Pre-define digital, analog, and DAA signal wiring areas on the PCB. (2) Separate digital and analog components and their respective traces as much as possible, placing them in their designated wiring areas. (3) Keep high-speed digital signal traces as short as possible. (4) Keep sensitive analog signal traces as short as possible. (5) Allocate … Read more
When it comes to PCB boards, many friends might think of how ubiquitous they are around us, from all household appliances, various components inside computers, to various digital products; almost every electronic product will use PCB boards. So what exactly is a PCB board? A PCB board is a Printed Circuit Board, which serves as … Read more
The PCB routing work is like a connect-the-dots game for many engineers, and it can be a very tedious task. This is actually just a basic understanding; a proficient PCB design engineer can accomplish much more and solve many problems in product design. This article combines some design rules from major manufacturers and several technical … Read more
PCB, also known as Printed Circuit Board, can connect electronic components and implement functions. It is also an important part of power circuit design. This article will introduce the basic rules of PCB layout and wiring.1. Basic Rules of Component Layout 1. Layout according to circuit modules; related circuits with the same function are called … Read more
It is well known that PCB design always has a series of principles to follow. If these principles are not adhered to, it may lower the success probability of PCB design, affect product performance, and even have negative impacts on signal integrity, electromagnetic radiation control, and system reliability. Today, this article will analyze these principles, … Read more
Layout In design, layout is an important aspect. The quality of the layout directly affects the wiring results, so it can be said that a reasonable layout is the first step to successful PCB design. Especially pre-layout, which is the process of considering the entire circuit board, signal flow, heat dissipation, structure, and other architectures. … Read more