lc75411es Sanyo Semiconductor Corporation, lc75411es Datasheet - Page 25

• Manufacturer Part Number: lc75411es
• Description: Electronic Volume Controller For Car Audio Systems
• Manufacturer: Sanyo Semiconductor Corporation

Treble Band Circuit
The shelving characteristics for the treble band can be obtained.
The equivalent circuit and the calculation formula during boost are shown below.
• Calculation example
Specification Setting frequency: f = 26000 Hz
Gain during maximum boost: G = 12 dB
Let us use R1 = 12.840 kΩ and R2 = 38.861 kΩ
The above constants are inserted in the following formula.
G
C
=
=
=
20
2
2
f
LOG
(
10
26000
G
10
R2
/
20
1
1
–
+
1
. 3
)
2
38861
981
R
–
1
1
R1
2
–
+
2
1
R2
( /
1
2
–
C
12840
)
C
2
LC75411ES, 75411WS
2
2700(pF)
R1
R2
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