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  1. Switching amplifier
    • 根据 2 个来源
    A Class D amplifier, alternately referred to as a switching amplifier, diverges from conventional amplifier counterparts, known as Linear amplifiers (comprising Class A, B, and AB).

    Introduction to Class D Audi…

    icepoweraudio.com
    A traditional class D amplifier is a switching amplifier, usually consisting of two power MOSFETs with pulse-width-modulation (PWM) signal.

    Class D Audio Amplifier IC …

    infineon.com
  2. 其他用户还问了以下问题
    What is a Class D amplifier?
    Block diagram of a basic class-D amplifier. Note: For clarity, signal periods are not shown to scale. A class-D amplifier or switching amplifier is an electronic amplifier in which the amplifying devices (transistors, usually MOSFETs) operate as electronic switches, and not as linear gain devices as in other amplifiers.

    Class-D amplifier - Wikipedia

    en.wikipedia.org
    Is a Class D amplifier better than a class AB?
    Even so, the efficiency of a practical Class-D amplifier can be better than 90 percent, which is significantly better than a Class-AB design (78.5 percent at best and typically closer to 50 percent). Coming full circle, because a Class-D amplifier is more efficient than the conventional Class-AB one, it can be lighter.

    What Is Class-D Amplification? - Sound On Sound

    soundonsound.com
    What are Class-D amplifiers?
    This brings me to the topic of this article: Class-D amplifiers. The whole reason for existence of Class-D is efficiency. Plainly, there must also be Class-A, Class-B and Class-C, and one would expect these to be earlier developments, as they come before D in the alphabet.

    What Is Class-D Amplification? - Sound On Sound

    soundonsound.com
    How much does a Class D power amplifier weigh?
    Amplifiers with several kilowatts of output power are available as class D. Class-D power amplifiers are available that are rated at 3000 W total output, yet weigh only 3.6 kg (8 lb).

    Class-D amplifier - Wikipedia

    en.wikipedia.org
    How do I choose a Class D amplifier?
    One of the first factors to consider when choosing a Class D amplifier is the power output requirements. This refers to the amount of power that the amplifier can deliver to your speakers or audio system. It is important to match the power output of the amplifier with the power handling capabilities of your speakers to ensure optimal performance.

    Understanding Class D Amplifiers: Advantages, Disadvantages, And

    soundscapehq.com
    Why does a Class D amplifier have a transformer?
    And that, in a nutshell, is the reason for Class-D's existence. Lighter also leads to smaller, and to achieve the high switching speeds necessary, the circuitry has to be physically small. Look inside a Class-D amplifier and you'll find a transformer.

    What Is Class-D Amplification? - Sound On Sound

    soundonsound.com
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    Wikipedia
    https://en.wikipedia.org/wiki/Class-D_amplifier

    Class-D amplifier - Wikipedia

    A class-D amplifier or switching amplifier is an electronic amplifier in which the amplifying devices (transistors, usually MOSFETs) operate as electronic switches, and not as linear gain devices as in other amplifiers. They operate by rapidly switching back and forth between the supply rails, using pulse-width … 展开

    History

    The first class-D amplifier was invented by British scientist Alec Reeves in the 1950s and was first called by that name in 1955. The first commercial product was a kit module called the 展开

    Design challenges 图像
    Design challenges

    Switching speed
    Two significant design challenges for MOSFET driver circuits in class-D amplifiers are keeping dead times and linear mode operation as short as possible. Dead time is the period during a switching transition when … 展开

    Advantages

    The major advantage of a class-D amplifier is that it can be more efficient than a linear amplifier by dissipating less power as heat in the active devices. Given that large 展开

    概览 图像
    Basic operation

    Class-D amplifiers work by generating a train of rectangular pulses of fixed amplitude but varying width and separation. This … 展开

    Signal modulation

    The 2-level waveform is derived using pulse-width modulation (PWM), pulse-density modulation (sometimes referred to as pulse frequency modulation), sliding mode control (more commonly called self-oscillating modulation. ) or discrete-time forms of modulation … 展开

    Error control

    The actual output of the amplifier is not just dependent on the content of the modulated PWM signal. A number of sources may introduce errors. Any variation in power supply … 展开

    Uses

    • Home theater in a box systems. These economical home cinema systems are almost universally equipped with class-D amplifiers. On account of modest performance requirements … 展开

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  4. analog.com
    https://www.analog.com/cn/resources/technical...

    D类放大器：基本工作原理和近期发展 | Analog Devices

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