Summary of battery standards and regulatory knowledge from around the world

Unfortunately, in the past two decades, lithium batteries have made headlines several times in terms of safety. Many incidents caused by lithium batteries have ...

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EMI Suppression in Microcontroller Packaging

IC packaging typically includes silicon based chips, a small internal PCB, and solder pads. The silicon based chip is installed on a small 64PCB, and the conne...

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On the Signal Input Mode of Power Amplifiers

Regarding the selection of signal input mode for power amplifiers. In professional audio engineering, problems such as signal parallel connection and bridging a...

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What are the characteristics of fingerprint, face, iris, heart rate, and voice r...

With the continuous emergence of biometric technology in the commercial field, more and more biometric technology devices or functions are being applied by peop...

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The design details of MOS transistor driver circuits that engineers must know

It is generally believed that MOSFETs are voltage driven and do not require driving current. However, there is a junction capacitor between the G and S stages...

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How to design low noise operational amplifiers

The reality of physical processes prevents us from obtaining ideal operational amplifiers with perfect accuracy, zero noise, infinite open-loop gain, conversion...

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CM119 USB Headphone Microphone Speaker Speaker Solution

CM119 is a highly integrated single-chip USB audio controller specifically designed for VoIP (Voice over Internet Protocol) applications. All important analog m...

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Working principle of three-phase PWM motor driver A3936

Brushless DC motors have the advantages of simple structure, reliable operation, and convenient maintenance of AC motors, as well as the high efficiency and goo...

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LED chip technology and analysis of domestic and international differences

Chip is the core component of LED. At present, there are many LED chip manufacturers both domestically and internationally, but there is no unified standard for...

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Single chip full bridge AutoResonant transmitter IC simplifies wireless battery ...

The wireless power transmission system consists of two parts, separated by an air gap in the middle: a transmission (Tx) circuit, including a transmission coil;...

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Fundamentals of Motor Control Design

Both software and hardware are part of all motor control systems, such as IGBT, WBG semiconductor, and MCU. The development of Industry 4.0 strongly relies on m...

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frequency response

The frequency range refers to the range between the lowest effective playback frequency and the highest effective playback frequency that the audio system can p...

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Noise and grounding issues

Earth and electricity (signal) are inseparable twins. Grounding usually refers to connecting a conductor to the ground. In electronic technology, the ground may...

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Illumination level of common negative and common positive digital tubes

1. Common cathode digital tube When the bit is selected as low level, select the digital tube. (Because the bit selection is essentially connected to the commo...

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Detailed explanation of the working principle of the full bridge motor drive cir...

In circuit design, the role of a full bridge is very important. When the four diodes in a bridge rectifier circuit are packaged together, they form a full bridg...

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Analysis of the Development Status and Future Trends of Intelligent Speakers

OFweek Smart Home Network News: In 2014, smart speakers began to enter the domestic market, but at that time they were not yet called smart speakers, but rather...

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BLDC Motor Control Design

DC motors are widely used in the fields of servo automation and robotics. The working principle of an electric motor is based on the interaction between two mu...

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Selection and Selection of Power Filter Capacitors

In rectifier filtering circuits, the selection of filtering capacitors is often based on the formula RC ≥ (3-5) T/2. In actual circuit design, some people als...

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An article for newcomers who want to play with audio systems

The development history of sound technology can be divided into four stages: electronic tubes, transistors, integrated circuits, and field-effect transistors.

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Introduction of overvoltage protection device ESD electrostatic protection devic...

The most commonly used ESD protection devices on the market can be divided into three categories: polymers, varistors/suppressors, and diodes. The biggest chall...

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