6
Features
Conception
Theblock diagramon thefollowingpageshows theDACin principle.
Main features are thesignalprocessingsystemDSP56004 forsoftware-
controlled digital-filtering, the20 bit noise-shaping/converting-
combination SAA7350 and TDA1547, thedecouplingoftheconverter
clock fromthesignalsource clock byatemperature regulation circuit, the
complete(electricallyand galvanic) separation ofdigitaland analogue
section, thediscretebuilt up Audionetoperationalamplifiers and the
lavish power supplywith awealth ofpre- and main regulators.
TheAudionetDACeliminates clock-jitter perfectlywith an unique
temperature regulated clock-generation. Theclock oftheconverter is
completelyseparated fromthesource clock. Theincomingdataare
loaded into abuffer, which can store up to 0.7 seconds ofmusic.
Thestored dataare read with an internallygenerated clock and converted.
Theinternalclock is generated with highestprecision bytwo
temperature-regulated quartzes. Theclock generatoris located nextto the
converter partin order to preventelectricalinterference.
Thetemperature regulation circuit ensures, thattheinternalclock is
adjusted with highestaccuracyto theoriginalclock frequencyofthe
signalsource. Forthis thesignalprocessorpermanentlychecks thestate
ofthebuffer memoryand calculates fromthis thevaluefortheheatingof
theinternalclock generator.
All dataare transmitted on opto-electricallypaths to eliminateany
interference.
Becauseofthenecessarysluggishness ofthetemperature regulation
circuit, theDACneeds abouttwo hours warming-up time, before you can
enjoythehighestfidelity.
clock decoupling
