參數(shù)資料
型號(hào): LC75342M
廠商: Sanyo Electric Co.,Ltd.
英文描述: Single-Chip Volume and Tone Control System
中文描述: 單芯片音量和音調(diào)控制系統(tǒng)
文件頁(yè)數(shù): 18/20頁(yè)
文件大小: 306K
代理商: LC75342M
Bass Band Circuit
This section presents the equivalent circuit and the calculations for the external capacitors and resistors used to achieve a
center frequency of 100 Hz.
Bass band equivalent circuit
Sample calculation
Specifications
Center frequency: f0 = 100 Hz
Gain at maximum boost: G = 20 dB
Let R1 = 0, R2 = 66.6 K
, and C1 = C2 = C.
(1) Determine R2 from the fact that G = 20 dB.
2R3
G
+20dB
= 20
×
LOG
10
1 + ——
R2
66000
2
×
(10 – 1)
R3
= ———————— = —————
3.7
k
2 (10
G+20dB/20
– 1)
(2) Determine C from the fact that the center frequency f0 = 100 Hz.
1
f
0 = ————————
2
π
R3R2C1C2
1
1
C
= —————— = ———————————
0.1
μF
2
π
f
0
R
3
R
2
2
π
×
100 66000
×
3700
(3) Determine Q.
2
R
3
Q
= ——— —1
2.1
R
3
R
2
No. 6271-18/20
LC75342, 75342M
(
)
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相關(guān)代理商/技術(shù)參數(shù)
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