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Why PCB ground and metal chassis with a resistive connection?

Electronics grounding is a clichéd topic, the main content of this article is the metal casing and circuit board grounding issues. We often see some of the system design will be the PCB board ground (GND) and metal enclosure (EGND) between the usual use of a high-voltage capacitor C1 (1 ~ 100nF / 2KV) in parallel with a large resistor R1 (1M) connection. So why this design? Fig. 1 Schematic diagram Figure. 2 Actual PCB The role of capacitors From the EMS (Electromagnetic Immunity) point of view, ....
2025-04-02 09:10:15 712
Why PCB ground and metal chassis with a resistive connection?

Why are PCBs deformed? What are the hazards?

PCB deformation risks Circuit boards that are not flat will result in incorrect placement in the automated surface mount line, make it impossible to mount or insert components into the board's holes and surface mount pads, and possibly even cause the automatic insertion machine to malfunction. It is challenging to cut component feet neatly and flat once they have been welded into the circuit board. The assembly factory experienced board warping, which is also quite frustrating, because the board cannot be i....
2025-04-01 17:21:06 1122
Why are PCBs deformed? What are the hazards?

Common-Emitter Amplifier Explained: Key Features, Working Principle, and Applications

What is Common-Emitter Amplifier? A common-emitter amplifier is a type of transistor amplifier circuit that is widely used in electronic circuits. Its name comes from the way the signal is input and output: the signal is input from the base and emitter of the transistor, and output from the collector and emitter. Because the emitter acts as a common ground in the circuit, this circuit is called a common emitter amplifier circuit. This circuit is known for its high voltage gain, large current amplification, ....
2025-03-31 11:26:32 832
Common-Emitter Amplifier Explained: Key Features, Working Principle, and Applications

What Is an FPGA? Everything You Need to Know About the Magic of Programmable Chips

The Field Programmable Gate Array, or FPGA, is a device that is frequently referred to as the "LEGO of hardware" in the field of electronics. It may be operating covertly inside gadgets all around you, including 5G base stations, driverless cars, and even spacecraft, even if you are unaware of its name. This article will explain what an FPGA is, how it functions, its applications, and how it stacks up against more conventional devices like MCUs and ASICs. 1. What Is an FPGA? Explained in One Simple Senten....
2025-03-26 11:27:47 1312
What Is an FPGA? Everything You Need to Know About the Magic of Programmable Chips

Explained: How to Properly Select Resistors and Capacitors in Bootstrap Circuits

The industry constantly seeks to reduce the cost of the driver stage in some low-cost applications, particularly for some 600V low-power IGBTs. Because of the circuit's affordability and ease of use, bootstrap power supplies have thus gained popularity as a means of supplying power to high-voltage gate driver (HVIC) circuits. The Operation of Bootstrap Circuits Only a 15–18V power source is needed to activate the inverter's driving stage in the bootstrap circuit below. The drivers of the top half-br....
2025-03-21 11:25:01 1228
Explained: How to Properly Select Resistors and Capacitors in Bootstrap Circuits

PCBA Manufacturing Guide: From Basics to Advanced Soldering, Testing & Inspection

What is PCBA? Modern electronics are built on printed circuit board assemblies, or PCBAs. It takes a bare Printed Circuit Board (PCB) and populates it with essential electronic components—resistors, capacitors, ICs, and connectors—into a fully functional circuit. But what goes into PCBA, and how is the industry evolving to meet new challenges? Let's explore. PCB vs PCBA Printed circuit boards, or PCBs, are unfinished boards without any electronic components but containing copper lines. PCBA (P....
2025-03-13 10:41:39 1526
PCBA Manufacturing Guide: From Basics to Advanced Soldering, Testing & Inspection

How Artificial Intelligence and Sensor Technology Can Boost Agricultural Productivity

BackgroundIn the context of continued global population growth and increased pressure on resources and the environment, improving agricultural productivity has become an important means of ensuring food security and promoting sustainable agricultural development. Challenges facing traditional agriculture include inefficient use of resources, high labor costs, and weak ability to deal with natural disasters and pests. The integration of artificial intelligence (AI) and sensor technology not only revolutioniz....
2025-03-12 11:04:34 525
How Artificial Intelligence and Sensor Technology Can Boost Agricultural Productivity

Convergence and Trade-off between Floating Point and Fixed Point - Local Floating Point Optimization Design Based on IIR Filters

The most widely used data type that ensures high-precision computing for modeling and simulating algorithms is floating-point. In order to preserve hardware resources and expedite computation, the only way to implement these floating-point algorithms on FPGA or ASIC technology is to transform each data type in the algorithm to fixed-point. It can occasionally be challenging to achieve the ideal balance between word length and mathematical accuracy of a data type during conversion, and switching to fixed-poi....
2025-03-10 11:55:57 1246
Convergence and Trade-off between Floating Point and Fixed Point - Local Floating Point Optimization Design Based on IIR Filters

Benefits of 5G Connectivity in Smart IoT Devices

At a time of rapid technological development, the Internet of Smart Things (IoT) is integrating into all corners of people's lives and social production at an unprecedented rate. From the convenient experience of smart homes to the intelligent upgrading of industrial output, the wide application of smart IoT devices is reshaping our world. 5G connectivity, as a new generation of communication technology, has injected a strong impetus for smart IoT devices and brought many significant advantages. High spee....
2025-03-05 14:28:11 624
Benefits of 5G Connectivity in Smart IoT Devices

Digital Power Supply VS Analog Power Supply

To enhance understanding of digital and analog power supplies, this article introduces the definitions, characteristics, and advantages of both. What is a Digital Power Supply? A digital power supply is a type of power supply that uses digital control techniques to regulate voltage and current. Instead of relying on analog components like resistors, capacitors, and transformers to control power output, digital power supplies utilize microcontrollers, processors, and digital signal processors (DSPs) to preci....
2025-02-14 10:46:26 1563
Digital Power Supply VS Analog Power Supply

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