YMU757B Datasheet, PDF (33/43 Pages) YAMAHA CORPORATION – MA-1C

YMU757B
If add resister R3, frequency characteristic is as follows.
C1 R1
EQ1
FM
VOL
EQ2
C2
R2
+
R3
EQ3
VREF
Gain1= (R2+R3) /R1. Gain2=R3/R1.
Cut off frequency f1 and f2 of filter is as follows.
f1=1/ (2π×R1×C1).
f2=1/ (2π×R2×C2).
Gain
Gain1
Gain1-3dB
Gain2
Freq
f1
f2
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