"One week's work on Analog Electronics" - power amplifier

List of articles

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Preface

power amplifier Refers to a kind of For the purpose of outputting large power Amplifier circuit

characteristic ： High output voltage 、 High output current 、 The output resistance of the amplifying circuit matches the load
The difference between voltage amplifier and power amplifier ：
Voltage amplification — Working in small signal state , The power amplifier operates in a large signal state ;

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One 、 The working mode of power amplifier triode

Two 、 Internal structure of power amplifier

Integrated power amplifier such as LM386, Its peripheral circuit and principle

With LM1875 The simulation diagram of audio power amplifier is as follows ：

The simulation results are as follows ：

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