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

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

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

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

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

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

• 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