n Supplied remote commander
Gives access to various functions
including direct play, repeat, pro-
gram play, input switching, and
level control.The DSD signal from the input is upsampled by a factor of
2, resulting in a sampling frequency of 5.6448 MHz/1-bit.
After volume processing, the circuit performs D/A
conversion using a highly ingenious moving-average
ﬁ lter principle.
In the DP-700, this involves seven delay devices and eight
MDS++ type D/A converters. The signal is delayed (shifted)
progressively by one clock cycle to produce eight signals
which are sent to separate D/A converters for direct D/A
conversion. The converted signals are then summed.
Since conversion errors are kept to an absolute minimum
by the use of MDS++ type DACs, the MDSD principle
results in an 8-pole high-cut ﬁ lter with perfectly
linear phase characteristics.
Innovative digital signal processing : MDSD (Multiple Double Speed DSD)
m Reduces noise during volume processingm Shifts the effective ﬁ lter frequency upwards
Digital volume processingVolume Upsampler
x2 2.8224 MHz/1-bit 5.6448 MHz/1-bit
Delayed by 1 clock cycleNormal phase output
Reverse phase output
“Moving-average ﬁ lter” circuit
Current summing Voltage summing
I (Current) - V (Voltage)