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参数资料
| 型号： | LC75347E |
| 厂商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分类： | 音频控制 |
| 英文描述： | 6 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP44 |
| 封装： | QIP-44 |
| 文件页数： | 5/17页 |
| 文件大小： | 600K |
| 代理商： | LC75347E |
Calculating the Equalizer External Component Values
1. Bass Band Circuit
Here we show the equivalent circuit and the formulas for calculating the capacitor and resistor values for a center
frequency of 100 Hz.
Bass band equivalent circuit
Sample calculation
Specifications: Center frequency, f0 = 100 Hz
Gain at maximum boost: G = 12 dB
Assume R1 = 27
, R2 = 38,834 , and C1 = C2 = C.
(1) Determine R3 from the fact that G = 12 dB.
(2) Determine C from the fact that the center frequency, f0, is 100 Hz.
(3) Determine Q.
No. 7378 -13/17
LC75347E
R1
R2
R3
C2
C1
2R3 + R1
R2
G+12dB = 20
× LOG
10
1 +
=
≠ 6500
2
– 27
(3.981 – 1)
38834
2
(10
G/20 –1)
–R1
R2
R3 =
(R1 + R2) R3C1C2
2
π
1
f0 =
C =
≠ 0.1 F
(38834 + 27)
× 6500
2
π × 100
1
(R1 + R2) R3
2
πf
0
1
=
≠ 1.22
(R1 + R2) R3
1
2R3 + R1
(R1 + R2) R3
Q =
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LC75347E-E | 制造商:ON Semiconductor 功能描述:ELECTRONIC VOLUME - Trays |
| LC75347EH-UC-E | 功能描述:多媒体杂项 RoHS:否 制造商:Texas Instruments 类型: 通道数量: 转换速率:540 Mbps 分辨率: 封装 / 箱体:SOIC-16 封装:Tube |
| LC75348 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Single-Chip Electronic Volume and Tone Control System |
| LC75348M | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Single-Chip Electronic Volume and Tone Control System |
| LC75348M-TLM-E | 功能描述:音频 DSP RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
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