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| 型号： | SA575DG |
| 厂商： | ON Semiconductor |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC COMPANDOR 2CHAN GAIN 20-SOIC |
| 标准包装： | 38 |
| 类型： | 压缩扩展器 |
| 应用： | 蜂窝式无线电，混频器 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 1131 (CN2011-ZH PDF) |
| 其它名称： | SA575DG-ND SA575DGOS |
SA575
http://onsemi.com
6
Compressor
The typical compressor configuration is shown in
Figure 3. In this mode, the rectifier cell and variable gain
cell are in the feedback path. R6 and R7 provide the DC
feedback to the summing amplifier. The input is AC
coupled through C12 and output is AC coupled through C8.
In a system with inputs and outputs AC coupled, C8 and C12
could be eliminated and only R6, R7, C7, and C13 would be
required. If the external components R6, R7 and C7 are
eliminated, then the output of the summing amplifier will
motor-boat in absence of signals or at extremely low
signals. This is because there is no DC feedback path from
the output to input. In the presence of an AC signal this
phenomenon is not observed and the circuit will appear to
function properly.
The compressor gain expression and the attack and
release time constant is given by Equation 3 and
Equation 4, respectively.
(eq. 3)
4VIN(avg)
3.8 k
W x 100 mA
where VIN(avg) = 0.95VIN(RMS)
1/2
Compressor gain =
(eq. 4)
tR = tA = 10 kW x CRECT = 10 kW x C4
2.2
mF
4.7
mF
10
mF
10
mF
1
mF
VREF
S
DG
C7
8
12
14
COMP IN
COMP OUT
11
16
15
13
Figure 3. Typical Compressor Configuration
10k
W
10k
W
3.8k
W
30k
W
30k
W
C12
R6
R7
C8
C13
C9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SA575DK | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low voltage compandor |
| SA575DR2 | 功能描述:音频放大器 3-7V Precision Dual RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| SA575DR2G | 功能描述:音频放大器 3-7V Precision Dual Gain Compandor RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| SA575DTB | 功能描述:音频放大器 3-7V Precision Dual RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| SA575DTBG | 功能描述:音频放大器 ANA COMPANDOR RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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