![]() Audio frequencies range from about 20 Hz to 20 kHz, so the amplifier must have good frequency response over this range (less when driving a band-limited speaker, such as a woofer or a tweeter). The goal of audio amplifiers is to reproduce input audio signals at sound-producing output elements, with desired volume and power levels-faithfully, efficiently, and at low distortion. What are Class D amplifiers? How do they compare with other kinds of amplifiers? Why is Class D of interest for audio? What is needed to make a “good” audio Class D amplifier? What are the features of ADI’s Class D amplifier products? Find the answers to all these questions in the following pages. ![]() ![]() Class D Audio Amplifiers: What, Why, and HowĬlass D amplifiers, first proposed in 1958, have become increasingly popular in recent years.
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