Regus
100+ Head-Fier
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- Oct 30, 2004
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I started thinking about building a DAC and having read about Class D amplifiers such as lyngdorf and got to wondering what kind of frequency one would need...
Now digital audio comes in a variety of shapes of sizes 16 bit 44.1 kHz being the most common... now if i understand it correctly this means that 44100 times every second there are 65536 different possible voltage levels this would seem to mean that the PWM modulation frequency would need to be 44100 * 65536 = 2,890,137,600 or in other words nearly 2.9 GHz from what i have read Class D amplifiers don't operate anywhere even close to this frequency - i think the lyngdorf ones do 3 or 400 kHz.
This leads me to the conclusion that I am missing some important piece of information.
Now asuming about .5 MHz would is actually enough. I would find it interesting to experiment with something along the lines of a PIC and some MOSFETs and see if one could make anything soundlike with these.
So someone please tell me what the missing piece of information is.
Now digital audio comes in a variety of shapes of sizes 16 bit 44.1 kHz being the most common... now if i understand it correctly this means that 44100 times every second there are 65536 different possible voltage levels this would seem to mean that the PWM modulation frequency would need to be 44100 * 65536 = 2,890,137,600 or in other words nearly 2.9 GHz from what i have read Class D amplifiers don't operate anywhere even close to this frequency - i think the lyngdorf ones do 3 or 400 kHz.
This leads me to the conclusion that I am missing some important piece of information.
Now asuming about .5 MHz would is actually enough. I would find it interesting to experiment with something along the lines of a PIC and some MOSFETs and see if one could make anything soundlike with these.
So someone please tell me what the missing piece of information is.