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參數(shù)資料
| 型號： | UTC571 |
| 廠商： | 友順科技股份有限公司 |
| 英文描述： | COMPANDER Complete compressor and expandor in one IChip |
| 中文描述： | 擴展器完整的壓縮機和expandor一個IChip |
| 文件頁數(shù)： | 11/14頁 |
| 文件大小： | 161K |
| 代理商： | UTC571 |
UTC571
LINEAR INTEGRATED CIRCUIT
YOUWANG ELECTRONICS CO.LTD
11
0.34
1
2
3
4
-6
0
+6
1mV
2mV
3mV
4mV
VOS=5mV
INPUT LEVEL(dBm)
%
Figure 10.
G Cell Distortion vs Offset Voltage
If the transistors are not perfectly matched, a parabolic, non-linearity is generated, which results in second
harmonic distortion. Figure 10 gives an indication of the magnitude of the distortion caused by a given input level
and offset voltage. The distortion is linearly proportional to the magnitude of the offset and the input level.
Saturation of the gain cell occurs at a +8dBm level. At a nominal operating level of 0dBm, a 1mV offset will yield
0.34% of second harmonic distortion. Most circuits are somewhat better than this, which means our overall offsets
are typically about mV. The distortion is not affected by the magnitude of the gain control current, and it does not
increase as the gain is changed. This second harmonic distortion could be eliminated by making perfect transistors,
but since that would be difficult, we have had to resort to other methods. A trim pin has been provided to allow
trimming of the internal offsets to zero, which effectively eliminated second harmonic distortion. Figure 11 shows
the simple trim network required.
V
CC
R
3.6V
20K
6.2K
200PF
TO THD
TRIM
Figure 11. THD Trim Network
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UTC571N | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:COMPANDER |
| UTC571NG-S16-R | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:COMPANDER |
| UTC571NG-S16-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:COMPANDER |
| UTC571NG-S16W-R | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:COMPANDER |
| UTC571NG-S16W-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:COMPANDER |
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