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參數資料
| 型號： | LC75394NE |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PQFP64 |
| 封裝： | QFP-64 |
| 文件頁數： | 4/17頁 |
| 文件大小： | 380K |
| 代理商： | LC75394NE |
Calculation example
Specifications: Central frequency, FO = 107 Hz
Q factor at maximum boost, Q+10 dB = 0.8
— Calculate QO, the sharpness of the simulated inductance itself.
QO = (R1 + R4)/R1 × Q+10dB
Note: R4 is from the separately issued internal block diagram.
≠ 4.270
— Calculate C1
C1 = 1/2
πF
OR1QO ≠ 0.536 (F)
— Calculate C2
C2 = QO/2πFOR2 ≠ 0.021 (F)
Sample results
Shelving characteristics (Band F5)
Achieving the desired control of 2-dB steps over the range between +10 dB to –10 dB requires choosing a
capacitor, C3, with an impedance of 650
.
No. 5466-12/17
LC75394NE
Central frequency
C1
C2
FO (Hz)
(F)
107
0.536
0.021
340
0.169
6663 P
1070
0.054
2117 P
3400
0.017
666 P
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