6
Features
Conception
The block diagram on the following page shows the DAC in principle.
Main features are the signal processing system DSP56004 for software-
controlled digital-filtering, the 20 bit noise-shaping/converting-
combination SAA7350 and TDA1547, the decoupling of the converter
clock from the signal source clock by a temperature regulation circuit, the
complete (electrically and galvanic) separation of digital and analogue
section, the discrete built up Audionet operational amplifiers and the
lavish power supply with a wealth of pre- and main regulators.
The Audionet DAC eliminates clock-jitter perfectly with an unique
temperature regulated clock-generation. The clock of the converter is
completely separated from the source clock. The incoming data are
loaded into a buffer, which can store up to 0.7 seconds of music.
The stored data are read with an internally generated clock and converted.
The internal clock is generated with highest precision by two
temperature-regulated quartzes. The clock generator is located next to the
converter part in order to prevent electrical interference.
The temperature regulation circuit ensures, that the internal clock is
adjusted with highest accuracy to the original clock frequency of the
signal source. For this the signal processor permanently checks the state
of the buffer memory and calculates from this the value for the heating of
the internal clock generator.
All data are transmitted on opto-electrically paths to eliminate any
interference.
Because of the necessary sluggishness of the temperature regulation
circuit, the DAC needs about two hours warming-up time, before you can
enjoy the highest fidelity.
clock decoupling
