Digitaalvõimendajate

Digitaalvõimendajate, also known as digital amplifiers or Class D amplifiers, represent a modern approach to audio amplification. Unlike traditional analog amplifiers that amplify the signal continuously, digital amplifiers work by converting the analog audio signal into a series of pulses. These pulses, often in the form of Pulse Width Modulation (PWM), represent the amplitude of the original audio signal. The amplifier then switches these pulses on and off at a very high frequency.

This switching action allows the amplifier to operate with much greater efficiency. When the output transistors are switched on, they conduct current, and when they are switched off, they do not. This minimizes the amount of power dissipated as heat, making digital amplifiers significantly more energy-efficient than their analog counterparts. This efficiency leads to smaller, lighter, and cooler-running amplifiers, which is particularly beneficial for portable devices and compact audio systems.

The digital nature of the amplification process also means that the signal is processed and manipulated in the digital domain for a significant portion of its journey through the amplifier. This can offer advantages in terms of noise reduction and distortion control, as the amplification stages are essentially acting as high-speed switches rather than linear amplification components. The output signal is then typically passed through a low-pass filter to reconstruct the original analog audio waveform before reaching the speakers. Digital amplifiers are widely used in consumer electronics, professional audio equipment, and automotive sound systems due to their efficiency and performance characteristics.