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參數(shù)資料
| 型號(hào)： | LUCW3020CCS-DB |
| 英文描述： | GSM Multiband RF Transceiver |
| 中文描述： | 手機(jī)多頻段射頻收發(fā)器 |
| 文件頁(yè)數(shù)： | 25/44頁(yè) |
| 文件大?。?/td> | 409K |
| 代理商： | LUCW3020CCS-DB |
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Advance Data Sheet
December 1999
W3020 GSM Multiband RF Transceiver
Lucent Technologies Inc.
25
Programming Information
(continued)
TR Register
(continued)
Table 26. G[0:6]: Digital Gain Control
Digital RX gain control with bits defined as follows:
G0:
When high, enables GSM900 or GSM1800/1900 LNA according to which band is selected by band bit B.
(See Table 14.)
G4:
IF gain: 0 = 0 dB, 1 = 32 dB.
G1:
0 = add 0 dB to baseband gain, 1 = add 4 dB to baseband gain in second amplifier.
G2:
0 = add 0 dB to baseband gain, 1 = add 8 dB to baseband gain in first amplifier.
G3:
0 = add 0 dB to baseband gain, 1 = add 16 dB to baseband gain in first amplifier.
G5:
0 = add 0 dB to baseband gain, 1 = add 21 dB to baseband gain in second amplifier.
G6:
0 = add 0 dB to baseband gain, 1 = add 4 dB to baseband gain in first amplifier.
The nominal demodulator mixer conversion gain is 4 dB; hence, total gain is always 4 dB higher than the DGC setting.
Voltage gain is differential assuming input matching network to 50
source impedance. (See Table 6.)
G6
Bit 9
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
0
1
1
* Not tested or recommended for use.
G4
G5
Bit 8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
G4
Bit 7
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
0
1
1
G3
Bit 6
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
0
1
1
G2
Bit 5
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0
1
1
G1
Bit 4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
DGC Gain
(dB)
0
4
8
12
16
20
24
28
32
36
40
44
48
52
56
60
64
21
81
85
Total Gain
(dB)
4
8
12
16
20
24
28
32
36
40
44
48
52
56
60
64
68
25*
85*
89*
32/0
6
16/0
8/0
4/0
21/0
4/0
G3
G2
G6*
G5*
G1
LPF1
LPF2
*Not tested.
Figure 9. IF and I/Q Gain Distribution (dB)
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