Power Amplifier - Nokia 9000i Service Manual

After Sales
Technical Documentation

Power amplifier

The power amplifier is a three stage discrete amplifier. It amplifies the 0
dBm ( 2 dBm in PCN) TX signal to the desired output level. It has been
specified for 5.5...8.5 volts operation. There are 5 x 330 mF capacitors in
the near vicinity of the power amplifier to alleviate supply voltage
degradation during TX burst.
Parameter
DC supply voltage (no RF)
DC supply voltage
Operating frequency range
GSM
PCN
Operating case temp. range
GSM
PCN
Max Output power GSM
PCN
Max Output power GSM
PCN
Input power GSM
PCN
Gain GSM
PCN
Efficiency GSM
PCN
Input VSWR (Zo=50 ohms)
Output VSWR (Zo=50 ohms)
Harmonics: 2 f
0
3 f , 4 f , 5 f
0 0
Noise power GSM
PCN
Ruggedness VBATT GSM
VBATT PCN
Stability (load VSWR 8:1)
Amendment 1 04/97
Table 14. Power amplifier specification
Minimum Typical /
Nominal
5.5
890
1710
34.5
31.5
33.5
31 32.5
0
2
34.5
29.5
0
8.0 V
T.B.D.
Maximum
10
7.2 8.5
915
1785
90
90
35 36
33 34.5
34 35
34
35 36
31 32.5
42
38
2.0
2.0
–30
–40
–114
–114
–60
RAE/RAK–1N
RF
Unit / Notes
V
V
MHz
MHz
deg.C
deg.C
dBm, normal cond
dBm, normal cond
dBm, extreme cond.
Vcc=5.4V, Ta = 55
C
dBm
dBm
dB, normal cond
dB, normal cond
%, Pout = 35 dBm
%, Pout = 32 dBm
dBc, Pout = 35 dBm
dBc, Pout = 32 dBm
dBm/Hz at RX band
dBm/Hz at RX band
VSWR=7, Pout=4W
T.B.D.
dBc, all spurious
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