參數(shù)資料
型號(hào): KA9270D
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: AUDIO FILTER INTRODUCTION
中文描述: 音頻過濾器簡介
文件頁數(shù): 5/7頁
文件大?。?/td> 274K
代理商: KA9270D
KA9270
AUDIO FILTER
3. MUTE
Fig. 5 Equivalent Circuit of Mute Switch ON Mode
Mute attenuation [M (att)] ratio is as follow;
M (att) = 20 log
= 20 log R
6
4. LOW PASS FILTER
Fig. 6 Equivalent Circuit of LPF
Cut off frequency (F
C
) is as follow:
f
C
= 1
2
π
R
2
R
1
C
3
C
4
+
-
Vi
R6
Vo
R
QON
+
-
Vi
R3
R2
R1
C4
C3
Where:
R
QON
= internal TR
ON resistance
V
O
V
I
QON
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