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參數(shù)資料
| 型號： | LUCW3000CCN |
| 英文描述： | W3000 PLL Dual-Band Frequency Synthesizer |
| 中文描述： | W3000鎖相環(huán)雙頻段頻率合成器 |
| 文件頁數(shù)： | 21/28頁 |
| 文件大小： | 327K |
| 代理商： | LUCW3000CCN |
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Advance Data Sheet
December 1999
W3000 PLL Dual-Band Frequency Synthesizer
Lucent Technologies Inc.
21
Application Information
(continued)
For example, take a GSM application where a loop bandwidth of 22 kHz is required.
Other parameters specified by the system are listed below:
Parameter
Value
88 MHz/V
2.5 mA
7850
45°
20 dB
VCO Gain (K
VCO)
Charge Pump Current (I
CP)
Divider Ratio (value of midband frequency used) (N)
Required Phase Margin
Reference Frequency Attenuation from Additional Pole
Using the formulas above, the three time constants can be calculated as follows:
T1 = 2.63697E
–
10
–6
s
T2 = 3.14484E
–
10
–5
s
T3 = 2.38732E
–
10
–6
s
From these values, we can derive the initial component values as follows:
R1 = 2992
C1 = 0.96 nF
C2 = 10.5 nF
If we choose R2 = 15 k
, then
C3 = 159 pF
From these initial values, the loop filter components used in the application circuit can be derived through
practical optimization.
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| LUCW3000CCN-TR | W3000 PLL Dual-Band Frequency Synthesizer |
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| LUCW3020CCS | GSM Multiband RF Transceiver |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LUCW3000CCN-TR | 制造商:AGERE 制造商全稱:AGERE 功能描述:W3000 PLL Dual-Band Frequency Synthesizer |
| LUCW3011FCL | 制造商:AGERE 制造商全稱:AGERE 功能描述:1 GHz Quadrature Modulator |
| LUCW3020CCS | 制造商:AGERE 制造商全稱:AGERE 功能描述:GSM Multiband RF Transceiver |
| LUCW3020CCS-DB | 制造商:AGERE 制造商全稱:AGERE 功能描述:GSM Multiband RF Transceiver |
| LUCW3030ACA | 制造商:AGERE 制造商全稱:AGERE 功能描述:W3030 3 V Dual-Mode IF Cellular Receiver |
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