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參數(shù)資料
| 型號： | LC75383E |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP64 |
| 封裝： | QFP-64 |
| 文件頁數(shù)： | 4/17頁 |
| 文件大小： | 376K |
| 代理商： | LC75383E |
Sample Calculation for the Tone Block External Capacitors
The external capacitors used with the LC75383E are the structural components in semiconductor inductors, i.e.,
simulated inductors. Here we present the equivalent circuit and the formulas required to acquire the desired center
frequency.
1. Semiconductor inductor equivalent circuit
2. Sample calculation
Specifications: 1) Center frequency: Fo = 100 Hz
2) Q at maximum boost: Qmax = 1.05
Derive the sharpness, Qo, of the semiconductor inductor itself
Qo =
× Q
max ≈ 2.6481
Calculate C1
C1 = 1/2
πFoRT4Qo ≠ 0.60 (F)
Calculate C2
C2 =Qo/2
πFoRT3 ≠ 0.014 (F)
Note: See the tone block equivalent circuit for the internal resistance.
Technique for Reducing Noise in the Tone Circuit Output
The output noise can be improved by about 6 dB by providing an external impedance at resonance of Zo and adding
the capacitor C3 with a value of about 100 pF. An even larger noise reduction effect can be acquired by using a low
noise operational amplifier in the external circuit.
(RT4 + Rfeed)
RT4
No. 5002-12/17
LC75383E
相關(guān)PDF資料 |
PDF描述 |
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| LC75384NE-R | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP64 |
| LC75384NW | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP64 |
| LC75386NE-R | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP64 |
| LC75386NW | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP64 |
| LC75386NE | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP64 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC75385NE-R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LC75386NE | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Electronic Volume and Tone Control for Car Stereo Systems |
| LC75386NE-L | 制造商:SANYO Semiconductor Co Ltd 功能描述:2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP64 |
| LC75386NE-R | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:LC75386NE-R/LC75386NW |
| LC75386NE-R-E | 制造商:ON Semiconductor 功能描述: |
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