參數資料
型號： YMU757B
元件分類： 音頻合成
英文描述： TONE/MUSIC SYNTHESIZER, PQCC20
封裝： QFN-20
文件頁數： 26/43頁
文件大小： 663K
代理商： YMU757B
YMU757B
-32-
Sound quality correction circuit
It is possible to correct the sound quality and gain by using an external circuit connected to EQ1 to 3 terminals.
A circuit structure of EQ1 to 3 terminal inside and example of external circuit are as follows.
Gain and filter characteristic are adjusted by value of C1, C2, R1 and R2.
Gain = R2 / R1.
Recommendation of R1 is 22k
and R2 is 82k (gain = 3.7 times).
Cut off frequency f1 and f2 of filter is as follows.
f1=1/ (2π×R1×C1).
f2=1/ (2π×R2×C2).
Recommendation of each value are as follows.
If C1=0.022F and C2=120pF, cut off frequency f1=330Hz and f2=16kHz.
Moreover, the circuit enclosed with the dotted line becomes necessary when an analog signal is inputted from AIN and it
wants to mix it.
The level adjustment that it is mixed depends on the resistance ratio R2/Rx of Rx and R2.
The value of Rx when it wants to mix it in the amplitude of one time of AIN is 82k.
f1
f2
Gain1
Gain1 -3dB
Gain
Freq
+
VREF
EQ2
EQ3
FM
VOL
EQ1
R1
R2
C2
C1
Rx
C3
AIN
相關PDF資料
PDF描述
YMU757 TONE/MUSIC SYNTHESIZER, PDSO20
YMU759-Q TONE/MUSIC SYNTHESIZER, PQCC32
YMU759B-QZ TONE/MUSIC SYNTHESIZER, PQCC32
YMU759B-Q TONE/MUSIC SYNTHESIZER, PQCC32
YMU759C-QZ TONE/MUSIC SYNTHESIZER, PQCC32
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