Hello,
as I promissed just to share with you concept from YU3MA forum, this is pulse densinity modulated H bridge power dac driven by dsd64, in short it's an full bridge class D direct digital power amplifier pulse densinity modulated, contain no opamps... etc just directly flow DSD bits to the full bridge, more comparable to an water flow boiler with diference boiler flow hot water but this one flow dsd bits. : ) Tested up to dsd256, it might work on dsd512 too? Concept contain variable power supply as a volume control, 1.25V to 5V range. You need Amanero usb combo and you need DSD tracks in order to play sound trought this dac. You will be surprised by the huge dynamics and holographic unchanged and detailed sound! The power of this dev concept is in the range of 3 to 5 watts and I do not recommend more, you simply need to first adjust the current with CC pot by shorting +5V at the one of the 8 capacitors for example C165 to gnd with an ameter until your ameter display value close to 1A, than you are ready for sound testing. Here is soome pictures and videos and more details about further concept . Its fully diferential! Optimised for 8 ohm speakers! Not measured but I have bought Cosmos ADC and when I finish some concepts and when I get ready for measurement I will do it, hope somebody do it allready. Gerber, bom and schematic is in atachment. Please pay atention to R72 resistor, change it for 2mA, ohm law yuor input dc voltage and calculate resistor value for 2mA! Enjoy!
as I promissed just to share with you concept from YU3MA forum, this is pulse densinity modulated H bridge power dac driven by dsd64, in short it's an full bridge class D direct digital power amplifier pulse densinity modulated, contain no opamps... etc just directly flow DSD bits to the full bridge, more comparable to an water flow boiler with diference boiler flow hot water but this one flow dsd bits. : ) Tested up to dsd256, it might work on dsd512 too? Concept contain variable power supply as a volume control, 1.25V to 5V range. You need Amanero usb combo and you need DSD tracks in order to play sound trought this dac. You will be surprised by the huge dynamics and holographic unchanged and detailed sound! The power of this dev concept is in the range of 3 to 5 watts and I do not recommend more, you simply need to first adjust the current with CC pot by shorting +5V at the one of the 8 capacitors for example C165 to gnd with an ameter until your ameter display value close to 1A, than you are ready for sound testing. Here is soome pictures and videos and more details about further concept . Its fully diferential! Optimised for 8 ohm speakers! Not measured but I have bought Cosmos ADC and when I finish some concepts and when I get ready for measurement I will do it, hope somebody do it allready. Gerber, bom and schematic is in atachment. Please pay atention to R72 resistor, change it for 2mA, ohm law yuor input dc voltage and calculate resistor value for 2mA! Enjoy!
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