How to realize high quality audio in portable multimedia system

In the current portable multimedia devices with centralized functions, more and more functions are being integrated into smaller and smaller systems. Audio ...

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Design and implementation of narrow pulse small signal operational amplifier cir...

Abstract: This paper designs and implements a narrow pulse small signal operational amplifier circuit. At the beginning of the article, it first introduces ...

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Design of DC regulated power supply

Stabilized voltage supply is the English name of regulated power supply, which is an electronic device that can provide stable AC power supply or DC power s...

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Influence of water on capacitive touch screen and waterproof strategy in design

1、 Introduction Waterproof performance is a landmark index to measure the design performance of multi-point capacitive touch screen. It seems that the mult...

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Design of off-line switching power supply

The off-line switching power supply usually uses rectifier bridge and input filter capacitor to absorb energy from the input, and the large capacitor is cha...

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Principle and design of high fidelity BTL amplifier

This paper introduces a BTL Power amplifier circuit without debugging, with high fidelity and low cost, and the final power amplifier IC can be selected acc...

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Design of shutdown function for boost converter

Figure 1 shows the boost switch converter circuit, which has a well-known problem: if the input of boost converter IC1 is pulled down to turn off the boost ...

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Hidden behavior and characteristic analysis of passive components on PCB

Traditionally, EMC has been regarded as "black magic". In fact, EMC can be understood by mathematical formulas. However, even if there are mathematical anal...

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Working principle of step-up chip and step-down chip

Buck mode - boost mode, which you are familiar with, is also used more, such as 5v- "3.3V voltage stabilization. There are many corresponding chips, which y...

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Identification of resistance and capacitance

一、 Color ring representation of resistance value 1. Correspondence between color and number:

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Choose the line voltage range of input capacitor ripple current by compromise

An interesting trade-off occurs when you choose an input filter capacitor for a low-power, offline power supply. You should choose the ripple current rating...

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Introduction of methods to reduce the interference of power transformer to audio...

The power transformer can interfere with the amplifier through magnetic field, electromagnetic induction and circuit, and it is the largest interference sou...

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Integrated brush DC solution how to reduce the size of automotive motor, enhance...

With simple control, low cost and diverse functions, brushless DC motor is very suitable for automotive loads that need integrated high-power and reliable m...

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Understand PCB layout differential signal

With the continuous development of semiconductor technology and deep pressure micron process, the switching speed of IC has increased from tens of MHz to hu...

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Basic principle analysis of LDO

The basic circuit of low dropout linear regulator (LDO) is shown in Figure 1-1. This circuit is composed of series regulator VT, sampling resistors R1 and R...

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See how a bad 20W amplifier design destroys the entire speaker system

Many engineers who work with speakers and amplifiers will tell you the same thing. If the amplifier is operated excessively, the speaker driver will be dama...

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Audio equipment parameter analysis

For products of various industries, as equipment, there are various parameters. For the audio industry, speakers, sound sources and amplification equipment ...

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The detection methods and characteristics of electrolytic capacitors are introdu...

Electrolytic capacitor is a capacitor composed of two parallel metal plates and electrolysis placed between the two metal plates. Electrolytic capacitor pla...

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Transient signal analysis in PCB circuit design

I still remember my class of differential equations. One of the topics discussed is damped oscillator circuits and transient signal responses, which occur i...

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Why are diodes not suitable for series and parallel connection

As we all know, resistors can be used in series or in parallel. So, are diodes suitable for series and parallel connection? Diode in series When dio...

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