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參數資料
| 型號： | U2893B |
| 英文描述： | Modulation PLL for GSM, DCS and PCS Systems |
| 中文描述： | 調制鎖相環用于GSM，DCS和PCS系統 |
| 文件頁數： | 9/14頁 |
| 文件大小： | 294K |
| 代理商： | U2893B |
U2893B
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A1, 29-Jan-97
9 (14)
Application Hints
For some of the baseband ICs it may be necessary to
reduce the I/Q voltage swing so that it can be handled by
the U2893B. In those cases, the following circuitry can be
used.
Q
NQ
NQ
Q
I
NI
NI
I
U2893B
Baseband IC
12496
R1
R1
R1
R1
R2
R2
Figure 12. Interfacing the U2893B to I/Q baseband circuits
Application examples for programming different modes.
RMODE 1
MC
VS2
RMODE
36k or
MC
VS2
MC
VS2
VS2
MC
U2893B
U2893B
U2893B
U2893B
R
R
RMODE 2
10k
a) single mode
b) any mode & mode 5
c) any mode
d) mode 5 & mode 3 or mode 4
Figure 13. Mode control
GND
CPC
2 mA
4 mA
U2893B
R1
R2
R1 = 2230 R
R2 = 1160 R (incl. rds_on of FET)
1 nF
12497
Figure 14. Programming the charge pump current
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相關代理商/技術參數 |
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| U2894B | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Modulation PLL for GSM, DCS and PCS Systems |
| U2894B-AFSG3 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Modulation PLL for GSM, DCS and PCS Systems |
| U2895B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Modulation PLL for GSM, DCS and PCS Systems |
| U2896B | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Modulation PLL for GSM, DCS and PCS Systems |
| U2896B-MFCG3 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Modulation PLL for GSM, DCS and PCS Systems |
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