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參數資料
| 型號： | LC75372E |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP44 |
| 封裝： | QFP-44 |
| 文件頁數： | 5/18頁 |
| 文件大小： | 481K |
| 代理商： | LC75372E |
Sample Calculation of the Loudness Circuit External Constants
First, see the LC75372E 10-dB step internal equivalent circuit shown on page 10. Figure 1 shows a circuit to which the
loudness circuit external components have been added, and which has been simplified for this calculation. The sample
calculation below uses this circuit diagram to acquire a 5-dB boost at f = 100 Hz.
(f = 100 Hz, 5-dB boost)
Assuming that the resistors and capacitors in Figure 1 have the following values:
R1 = R2 = 50 k
R3 = 5 k
And C1 = Z1 and C2 = Z2.
Then:
From the above equations we find:
Z1
≠ 891.5 k and Z2 = 880 .
Therefore, the specifications will be met if capacitors that have these impedances at f = 1 kHz are connected externally.
The result is that C1 = 178.5 pF and C2 = 0.18 F.
Figure 1
R2 (R3 + Z2)
R2 + R3 + Z2
R1 Z1
R1 + Z1
VOUT =
(at = 1 kHz)
= –20 dB
+
R2 (R3 + Z2)
R2 + R3 + Z2
R2 (R3 + 10 Z2)
R2 + R3 + 10 Z2
R1 10 Z1
R1 + 10 Z1
VOUT =
(at = 100 Hz)
= –15 dB
+
R2 (R3 + 10 Z2)
R2 + R3 + 10 Z2
No. 5330-13/18
LC75372E
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| LC75373E | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP44 |
| LC75374E | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP44 |
| LC75374E | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP44 |
| LC7537N | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDIP42 |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LC75373E | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Electronic Volume Control for Car Stereo Systems |
| LC75374E | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Electronic Volume and Tone Control for Car Stereos |
| LC7537AN | 制造商:Panasonic Industrial Company 功能描述:IC |
| LC7537N | 制造商:Panasonic Industrial Company 功能描述:IC |
| LC7537NE | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Electronic Volume Control System for Audio Equipment |
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