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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On the importance of smart power audio amplifier to smart phones

There seems to be no end to what people consume on smartphones, tablets or other portable devices. With the smart phone screen becoming larger and brighter,...

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What is an operational amplifier/comparator?

"We know that the amplified voltage can be supplied to the load without attenuation, and the voltage of the signal source will not decay. Therefore, we hope...

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Signal frequency response of transimpedance amplifier

In my previous blog about DC transimpedance amplifier "transimpedance amplifier Basics", we began to understand this simple circuit. Finally, at the end of ...

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Interference and suppression of PCB ground wire

Absrtact: in PCB design, especially in high-frequency circuits, we often encounter some irregular and abnormal phenomena caused by ground wire interference....

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Power MOSFET design considerations

MOSFET used as power switch With the continuous optimization of device design for decades, power MOSFET transistors have brought new circuit topology and im...

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