Application Details

Audio amplifiers are essential in audio systems, designed to increase weak audio signals to drive speakers and produce sound. While each type of amplifier boosts audio, the way they handle signals, manage heat, and affect audio quality varies significantly, leading to different classes of amplifiers with unique advantages and trade-offs. The main amplifier types—Class A, B, AB, and D—offer differences in sound fidelity, efficiency, and practicality which may affect which design is best according to various audio applications.

Class AB amplifier

By combining the principles of Class A and Class B, AB class amplifiers reduce crossover distortion while improving efficiency—ideal for home and pro audio systems that demand clarity with moderate power draw.

Class AB amplifier

By combining the principles of Class A and Class B, AB class amplifiers reduce crossover distortion while improving efficiency—ideal for home and pro audio systems that demand clarity with moderate power draw.

Class AB amplifier

By combining the principles of Class A and Class B, AB class amplifiers reduce crossover distortion while improving efficiency—ideal for home and pro audio systems that demand clarity with moderate power draw.

Class AB amplifier

By combining the principles of Class A and Class B, AB class amplifiers reduce crossover distortion while improving efficiency—ideal for home and pro audio systems that demand clarity with moderate power draw.

In a conventional SNR measurement a device is first stimulated with a signal at full scale with its volume control set to maximum, if present. A level measurement is made to establish the maximum output reference. The stimulus tone is then removed and the inputs of the device are either terminated or shorted. The residual noise is then measured. The SNR value is then the ratio of the full scale output level of the device to the residual noise level of a device.

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Brief description or details related to THD+N measurements and methodology.

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Overview and explanation of frequency response testing approach.

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Detailed explanation of SNR testing and calculation.

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Measuring Microphone Preamplifier Noise

Switch-mode audio power amplifiers are becoming increasingly popular due to their smaller size, lower weight, and improved efficiency. Their advantages are obvious in low power battery operated personal audio players and laptop computers. However they are also progressively displacing more traditional linear designs in mainstream applications such as home entertainment systems, automotive sound systems, and professional installations where high quality audio is important.

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