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参数资料
| 型号： | EVB3020A |
| 英文描述： | GSM Multiband RF Transceiver |
| 中文描述： | 手机多频段射频收发器 |
| 文件页数： | 18/44页 |
| 文件大小： | 409K |
| 代理商： | EVB3020A |
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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
G5
G4
G3
G2
G1
DGC Gain
Total Gain
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
(dB)
0
4
1
0
4
8
0
1
0
8
12
1
0
1
0
12
16
0
1
0
16
20
1
0
1
0
20
24
0
1
0
24
28
1
0
1
0
28
32
0
1
0
32
36
1
0
1
0
36
40
0
1
0
1
0
40
44
1
0
1
0
1
0
44
48
0
1
0
48
52
1
0
1
0
52
56
0
1
0
56
60
1
0
1
0
60
64
1
0
1
64
68
0
1
0
21
25*
1
0
81
85*
1
85
89*
* Not tested or recommended for use.
32/0
6
16/0
8/0
4/0
21/0
4/0
G4
G3
G2
G6*
G5*
G1
LPF1
LPF2
*Not tested.
Figure 9. IF and I/Q Gain Distribution (dB)
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