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參數資料
| 型號： | LC7527E |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), EQUALIZER CIRCUIT, PQFP64 |
| 封裝： | QFP-64 |
| 文件頁數： | 11/11頁 |
| 文件大小： | 244K |
| 代理商： | LC7527E |
External Component Value Calculations
The external capacitors required for each band in the LC7527E are the structural elements in semiconductor inductors
(simulated inductors). The remainder of this section presents the equivalent circuits and the formulas used to determine
the center frequencies.
1. Semiconductor Inductor Equivalent Circuit
The LC7527E provides circuits with differing constants for the low and high bands.
2. Calculation Example
Specifications: 1) Center frequency: Fo = 63 Hz
2) Q at maximum boost: Q+12 dB = 1.05
Derive the sharpness Qo of the semiconductor inductor itself.
Qo =
× Q
+12 dB ≈ 4.064
See the internal equivalent circuit figure for R4.
Derive C1.
C1 = 1/2
πFoR1Qo ≠ 0.953 (F)
Derive C2.
C2 = Qo/2
πFoR2 ≠ 0.034 (F)
3. Sample Values for C1 and C2
(R1 + R4)
R1
No. 4466-9/11
LC7527E
Center
C1
C2
frequency
(F)
Fo (Hz)
63
0.953
0.034
160
0.377
0.014
400
0.151
5390 p
1000
0.060
2156 p
2500
0.024
862 p
6300
9563 p
3422 p
16000
3765 p
1348 p
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相關代理商/技術參數 |
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