A class D amplifier works in a similar way to a switched power supply, switching instead of regulating or amplifying, and therefore presents the same advantages as these, that is, an efficiency of close to 95%, low electrical consumption, and achieving with it also much simpler circuits and lower cost and size. This is possible since in these cases the power transistors do not work in their active zone, as if done with the traditional type AB amplification, for example, and thus dissipating heat along with the amplified signal, but rather in the case of In type D amplification, the transistors work in cutoff and saturation mode, that is, turning on and off like a switch. The difference here is that the traditional amplifier generates a sinusoidal wave at its output that varies in voltage or current amplitude, but in the type D amplifier, on the contrary, we will find at its output a PWM type pulse that varies only in its period. active, this according to the intensity and frequency of the audio signal at the input.
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29 авг 2024
