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參數資料
| 型號： | W48S101 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | Spread Spectrum Motherboard Frequency Generator |
| 中文描述： | 擴頻主板頻率發生器 |
| 文件頁數： | 4/12頁 |
| 文件大?。?/td> | 143K |
| 代理商： | W48S101 |
W48S101-04
PRELIMINARY
4
Spread Spectrum Clock Generation
The benefits of using Spread Spectrum Clock Generation are
depicted in
Figure 3
. An EMI emission profile of a clock har-
monic is shown.
Contrast the typical clock EMI with the Cypress Spread Spec-
trum Clock Generation. Notice the spike in the typical clock.
This spike can make systems fail quasi-peak EMI testing. The
FCC and other regulatory agencies test for peak emissions.
With the Cypress clock, the peak energy is much lower (at
least 8 dB) because the energy is spread out across a wider
bandwidth.
Figure 3. Typical Clock and SSCG Comparison
SSFTG
Typical Clock
Frequency Span (MHz)
-SS%
+SS%
A
5dB/div
MAX (+0.5%)
MIN (
–
0.5%)
1
2
3
4
5
6
7
8
9
1
1
2
3
4
5
6
7
8
9
1
F
Figure 4. Typical Modulation Profile
相關PDF資料 |
PDF描述 |
|---|---|
| W48S111-14 | Spread Spectrum Desktop/Notebook System Frequency Generator(寬頻譜桌上型/筆記本系統頻率發生器) |
| W48S111 | Spread Spectrum Desktop/Notebook System Frequency Generator |
| W48S87-04 | Spread Spectrum 3 DIMM Desktop Clock(寬頻譜3 DIMM桌上型PC機時鐘) |
| W48S87-72H | CPU System Clock Generator |
| W48S87 | Spread Spectrum 3 DIMM Desktop Clock |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W48S101-04 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Spread Spectrum Motherboard Frequency Generator |
| W48S111 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Spread Spectrum Desktop/Notebook System Frequency Generator |
| W48S111-14 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Spread Spectrum Desktop/Notebook System Frequency Generator |
| W48S87 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Desktop/Notebook Frequency Generator |
| W48S87-04 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Spread Spectrum 3 DIMM Desktop Clock |
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