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28
22
GCAP
U900
B+ DC/DC
L
9
0
1
34
VSWITCH
R475
3
41
5.6V
RF
REF
SW
RF
CR910
39
Boost Mode Circuitry
Vswitch DC/DC
VRef
11
B+
B+
BATT+
EXT_B+
U220
GIFSYN
Q221
Q222
RX275
MDM_ANA_VCC
to GIFSYN
SF_OUT
to GIFSYN,
Q503, Q504, Q350
to U703, U802 and Logic Signals
to U805 ( Frequency Doubling )
U101
Q222
-10V
DP -10V
L500
to U104, Q304
R991
Filtered -10V
C105
Q301
PA_B+
B+
SW_VCC
Q1000
MIX_R275
R275
Q100
SW_RX_275
L275
Q113
Q114
DCS_RX_275
GSM_RX_275
AL
AL
VR901
Q905
Q906
Q999
CR998
DUAL BAND 8800 / 8900 Voltage Supply Block Diagram
Europe Middle East & Africa Customer Services
05.04.98
Voltage Supply Block Diagram
Rev. 1.0
DUAL BAND 8800 / 8900
Colin Jack, Michael Hansen, Billy Jenkins
Page 1
REVISIONS
to AL
to RF
to MIXER
Q460
to GSM_DCS Matrix
Q115
to DCS LNA
Q430
to GSM LNA
Q410
to RF
to Q100 and
Main VCO
to IF Amplifier Q480
17
13
12
19
18
35
C916
37
6
4
from Battery
from External Devices
B+
to GIFSYN Pin 25, 56
Summary of Contents for 880
Page 18: ...10 68P09403A50 12 9 97 Dual Band 880 890 DCS GSM ...
Page 22: ...14 68P09403A50 12 9 97 Dual Band 880 890 DCS GSM ...
Page 32: ...24 68P09403A50 12 9 97 Dual Band 880 890 DCS GSM ...
Page 36: ...28 68P09403A50 12 9 97 Dual Band 880 890 DCS GSM ...
Page 42: ...34 68P09403A50 12 9 97 Dual Band 880 890 DCS GSM ...
Page 64: ...56 68P09403A50 12 9 97 Dual Band 880 890 DCS GSM ...
Page 65: ...12 9 97 68P09403A50 57 Troubleshooting Figure 9 RF Block Diagram ...
Page 98: ...90 68P09403A50 12 9 97 Dual Band 880 890 DCS GSM ...
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