Howtosignalprocessing
What is a digital audio amplifier?
The digital amplifier system keeps the audio signal in the digital domain virtually all the way to the speaker, while the analog-based system converts the signal to analog very early in the process. The digital amplifier consists of two devices, the pulse width modulation (PWM) processor and the power stage.
How does an audio amplifier circuit work?
An amplifier takes an input signal from a source, such as a laptop, turntable or CD player, and creates a larger copy of the original signal before it's sent to the speakers. It gets the power to do this from your mains electricity, which is sent directly to the power supply within the amplifier.
