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Linear - Amplifiers - Audio

Audio amplifiers are an important component in any audio system and audio amplifier design has come a long way since the early days of analog technology. The LM4674TL/NOPB is a great example of modern audio amplifier technology and its application field and working principles are described in this article.

Application Field

The LM4674TL/NOPB is designed to be used in various audio applications, including home headphones, computer speakers, automotive audio systems, multimedia speakers, recording studio equipment and many more. It is a dual-channel low-power audio amplifier that can be used to power up to two speakers at a time, or it can be cascaded with other audio amplifiers to provide increased power and sound quality.

Working Principle

The LM4674TL/NOPB utilizes two identical amplifier stages to drive two separate audio channels. Each amplifier stage has its own power supply, allowing each channel to be powered independently. Each amplifier stage is composed of a differential input stage, a voltage amplifier stage, and a power output stage, with each of these stages providing voltage gain.

The differential input stage consists of two differential pairs of transistors, with each stage providing a small amount of voltage gain. The voltage amplifier stage is composed of a single differential pair of transistors, with each of these providing a large amount of voltage gain. Finally, the power output stage is composed of transistors that are connected in a push-pull configuration, with each of these providing the power output.

Performance and Features

The LM4674TL/NOPB provides excellent sound quality and has a wide range of features that make it suitable for a variety of audio applications. It has low distortion, low noise, and low output current, as well as excellent dynamic performance. It also provides temperature protection, input overload protection, and output short circuit protection, making it safe and reliable to use.

The LM4674TL/NOPB is also versatile and can be connected with various audio sources and equipment. It has a wide range of input and output impedance options, which makes it compatible with a wide range of audio system components. It is also available in a variety of package sizes, making it easy to install and incorporate into an audio system.

Conclusion

The LM4674TL/NOPB is an excellent audio amplifier that incorporates modern audio amplifier technology. It can be used in a variety of audio applications and provides excellent sound quality, low distortion, low noise, and low output current. It is also versatile and can be connected with various audio sources and equipment. Finally, it has a wide range of safety features, making it reliable and safe to use.

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