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參數資料
| 型號： | W3020 |
| 英文描述： | GSM Multiband RF Transceiver |
| 中文描述： | 手機多頻段射頻收發器 |
| 文件頁數： | 15/44頁 |
| 文件大小： | 409K |
| 代理商： | W3020 |
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Advance Data Sheet
December 1999
W3020 GSM Multiband RF Transceiver
Lucent Technologies Inc.
15
Modulator
The modulator uses an indirect I/Q modulator architecture that is ideal for multiband operation. The IF
modulation improves EVM effects due to improved carrier feedthrough. The series transmit IF filters allow
improved wideband noise, which enables duplexer removal. The I/Q modulator requires no amplitude or phase
calibration to achieve high phase accuracy. The modulator can be altered between GSM900 transmit mode (TX
IF = 270 MHz) and GSM1800/1900 transmit mode (TX IF = 180 MHz) by the band bit setting in the TR register.
Table 8. Modulator Performance
V
DD
=
2.7 V; T
A
= 25 °C ± 3 °C. IQ common mode = 1.6 V; input differential signal = 1.0 Vp-p.
Parameter
Min
—
25
—
10
—
1.5
0.8
880
1710
1850
–4.5
–4
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Typ
450
—
—
—
—
—
1
Max
—
—
10
—
10
Unit
kHz
k
pF
k
pF
V
Vp-p
MHz
MHz
MHz
dBm
dBm
μ
s
°rms
°rms
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc/Hz
dBc/Hz
/Q Signal Path Bandwidth
/Q Input Resistance to Ground
/Q Input Capacitance to Ground
/Q Input Resistance (differential)
/Q Input Capacitance (differential)
/Q Common-mode Range
/Q Input Differential Signal for Max Output
RF Output Band:
GSM900
GSM1800
GSM1900
Output Power:
GSM900 (LO1 at 1167 MHz)
GSM1800 (LO1 at 1567 MHz)
Powerup Time*
RMS Phase Accuracy
:
GSM900
GSM1800
GMSK Modulation Spectrum (max) (offset from carrier):
100 kHz
@30 kHz RBW
200 kHz
250 kHz
400 kHz
1.8 MHz—3.0 MHz
@100 kHz RBW
3.0 MHz—6.0 MHz
>6.0 MHz
Wideband Noise IF Modulator
GSM900:
f – f
0
|
≥
10 MHz
f – f
0
|
≥
20 MHz (PM)
GSM1800:
f – f
0
|
≥
20 MHz (PM)
Wideband Noise RF Mixer (See Figure 6.):
GSM900:
f – f
0
|
≥
10 MHz
f – f
0
|
≥
20 MHz (PM)
GSM1800:
f – f
0
|
≥
20 MHz (PM)
* From the programming latch going high to power available at RF output, Including TX IF filter group delay.
Including contributions from LO1, LO2, and modulator.
V
DD
– 1.05
1.2
915
1785
1910
6
6
4
—
—
0.5
–30
–33
–60
–65
–65
–73
—
—
—
—
—
—
—
—
—
0
0
—
2.0
2.5
—
—
—
—
—
—
—
–140
–140
–140
–154
–154
–153
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
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