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参数资料
| 型号： | LC75371M |
| 元件分类： | 音频控制 |
| 英文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO36 |
| 封装： | MFP-36 |
| 文件页数： | 4/17页 |
| 文件大小： | 523K |
| 代理商： | LC75371M |
No. 5348-12/17
LC75371M
Sample Calculation of the Loudness Circuit External Constants
First, see the LC75371M 10-dB step internal equivalent circuit shown on page 9. Figure 1 below shows a version of that
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
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PDF描述 |
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| LC75372E | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP44 |
| 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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LC75372E | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Electronic Volume Control for Car Stereo Systems |
| LC75373E | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Electronic Volume Control for Car Stereo Systems |
| LC75374E | 制造商:SANYO 制造商全称: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 |
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