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5-6
Schematic Diagrams
5-6 Transmit Output Stage
5
+3VTX
5
TXEN1
5
5
+VBATT
5
TXGSM
RXDCSIN
RXGSMIN
ANT
TXDCS
TXPOWER
5
5
5
5
5
DCSTX2
5
5
91
R429
5
GSMTX2
5
DCSTX2
33pF
C467
27pF
C459
R431
39
U414
TC7S66FU
4
CONT
GND
3
IN
1
OUT
2
5
VCC
L402
5.6nH
+3VALC
R413 560
4
-V
2
1
C457 27pF
LM7131ACM5
U406
OPAMP
3
+
5
+V
-
150
R430
1.2K_1%
R434
R435
1.8K_1%
27pF
27pF
C454
2
GND1
GND2
6
PORT1_GSM_IN
1
PORT2_GSM_OUT
7
PORT3_DCS_IN
35
PORT4_DCS_OUT
PORT5_COUPLING_OUT
84
PORT6_TERMINATION
+3VALC
C428
R416
12K_1%
COUPLER
U405
27pF
C458
+3VALC
R410 51
+3VALC
C464 220uF,6V
150
R432
R415 1K_1%
GND2
4
GND3
6
GND4
8
PIN
R409 3.3K_1%
2
ANT
16
DCSRx
13
DCSTRx
3
+3VTX
POWER_AMP
U402
GND1
2
GSMTRx
4
VC1
14
VC2
1
7
POUT
VAPC
3
5
VDD
U401
RF_SWITCH
GND1
5
GND2
6
GND3
8
GND4
10
GND5
11
GND6
12
GND7
15
GND8
1
GND9
9
GSMRx
7
100pF
C416
L405
33nH
R407 3.9K
+3VTX
820pF
R417 680
C415
+3VDCS
+3VDCS
SOT
R446
C430
R414
8.2K_1%
22pF
27pF
+3VGSM
C460
82
R428
HSMS-2805-L31
D400
51
R420
D401
MCL4154
R418
10K
10uF,6.3V
10K
R419
6.8nH
L403
VCC
5
C436
TC7S66FU
U413
CONT
43
GND
1
IN
2
OUT
C410
+3VALC
C405 27pF
C418 27pF
820pF
10nF
R427 91
C433
120
R404
220pF
C409
L401 33nH
+3VGSM
+3VTX
+3VTX
R412
22K_1%
GND4
1
PIN
POUT
7
3
VAPC
VDD
5
C423 27pF
U408
POWER_AMP
2
GND1
4
GND2
6
GND3
8
L406
560pF
C429
33nH
10nF
120pF
C445
100pF
C435
R445 68
C411
R406 120
+3VALC
7125
1608