Noise suppression and active noise reduction: what are the differences

Imagine you are talking to a friend on the phone at the airport. There are many people talking around you. The plane is taking off/landing. The wheels of do...

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Digital power supply and analog power supply

The digital power supply is different from the common analog power supply. The former uses digital PWM, a smaller integrated digital MOSFET and DRIVER chip,...

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10 Why‘s EMC Common?

1. Why should we design products for electromagnetic compatibility? Answer: Meet the functional requirements of the product, reduce the debugging time, mak...

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The function of audio DSP chip

What can dsp do? What is the main purpose of dsp chip? DSP, namely digital signal solution, is a kind of microprocessor that processes many data with digita...

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- 5V, - 3V, how is the negative voltage generated? Attached circuit analysis and...

In electronic circuits, we often need to use a negative voltage. For example, when we use an op amp, we often need to establish a negative voltage for it. L...

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Discussion on Class D Power Amplifier PWM

This paper discusses two common PWM modulation methods of Class D audio power amplifier: open-loop fixed frequency and closed-loop self-excited modulation. ...

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Methods and precautions for making power amplifier

The power amplifier (power amplifier for short) circuit in the general audio-visual circuit further amplifies the low-frequency signal after the voltage amp...

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Special Circuit of Car Audio Radio

Cars are becoming more and more popular, more and more people have cars, and more and more entertainment devices are available. Audio and video devices such...

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High performance step-down voltage regulator solves the power consumption proble...

自动化控制在工业和消费类应用中越来越普遍，但即便是一流的自动化解决方案，也要依赖一种古老的技术：电流环路。电流环路是控制环路中普遍存在的组件，可以双向工作：...

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How can you improve your dynamic loop response

The DC-DC converter converts the changing input voltage into (usually) a fixed output voltage through a feedback control system. The feedback control system...

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Frequency characteristic equivalent circuit of operational amplifier

Today we will learn the frequency characteristic equivalent circuit of the operational amplifier. 1、 Frequency characteristic equivalent circuit Learni...

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Influence of Integrated Circuits on EMI Design

EMC design usually uses various control technologies. Generally speaking, the closer to the EMI source, the lower the cost of realizing EM control. The inte...

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How to extend the playback duration

One of the core selling points of portable electronic products is the endurance. No matter how the trend changes, the endurance is the same selling point. E...

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Problems in PCB wiring of power amplifier circuit and preventive measures

Active speakers are the combination of speakers and amplifiers. Therefore, the noise analysis of active speakers is similar to that of general amplifiers. H...

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Design experience of ADC input protection

When designing ADC circuit, a common problem is "how to protect ADC input under overvoltage", then What problems may occur in the case of overvoltage? ...

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Operating principle of bootstrap circuit and selection of bootstrap resistance a...

In some low-cost applications, especially for some 600V low-power IGBTs, the industry always tries to minimize the driver level cost. As a result, bootstrap...

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DSP Implementation Scheme of Fingerprint Identification

Fingerprint identification technology can reliably identify individuals by analyzing local features of fingerprints and extracting detailed feature points f...

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H-bridge motor drive circuit using MOSFET

At first, driving the motor seems to be a simple task - just connect the motor to the appropriate voltage rail, and it will start to rotate. But this is not...

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Using Complementary Tubes to Achieve Double Voltage and Back Voltage in DC-DC Co...

The circuit in this design idea makes use of an inherent characteristic of collector voltage in single transformer push-pull DC/DC converter: that is, their...

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The mode and behavior of noise, the importance of distinguishing Earth from Grou...

The noise and signal that cause electronic equipment failure are both electrical energy. Electrical communication is the history of fighting against this di...

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