Akai PDP42Z5TA Service Manual page 87

SUGGESTED ANALOG RECONSTRUCTION FILTER
A second Sallen Key low pass reconstruction filter is recommend to remove the high frequency sigma delta modulator noise.
The filter's component values and characteristic are shown in the following figures.
Sallen Key 2nd order LP filter
5
0
-5
-10
-15
-20
-25
-30
3
10
1000 pF
4.7 uF 2.7 K
10 K
100 K
680 pF
LP F F requenc y Res pons e
4
10
F req (H z .)
85／148
+
-
10 K 10 K
All resistors and capicitors are
5% precision.
5
10
CE2836