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參數(shù)資料
| 型號： | U2893B |
| 英文描述： | Modulation PLL for GSM, DCS and PCS Systems |
| 中文描述： | 調(diào)制鎖相環(huán)用于GSM，DCS和PCS系統(tǒng) |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 294K |
| 代理商： | U2893B |
U2893B
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A1, 29-Jan-97
11 (14)
Application Circuit (900 MHz)
Voltage
reference
PFD
+
I/Q modulator
R : 1
divider
90
grd
MIXLO
VSP
GNDP
CPC
MDO
NMDO
RD
NI MDLO
PU
MIXO
Q
N : 1
divider
ND
NND
VS3
GND
Mixer
MUX
MC
Mode
control
RF
NRF
VS1
VS2
6 dB
attn.
MQE 550
VCO
10
50
390
To PA
2.7
LO (–10 dBm)
1192 MHz
I
Baseband processor
NQ
27n
12p
12p
2.7 to 3.5 V
Dr
Dr
f_Ref
v
rms
= 55 mV
4.7p
1k
PUMIX
CPO
U2893B
NRD
2
68p
3.3n
390
2.7 to 3.5 V
to 3.5 V
C
50
47nH
4
13316
Figure 16. Power-up, charge pump control, and mode control must be connected according to the application used
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