Motorola HT1250-LS+ - Figure 5-30. 700 Mhz Audio Power Amplifier Schematic Diagram

5-36 Schematic Diagrams, Overlays, and Parts Lists
INT_SPK-
EXT_SPK+
EXT_SPK-
OPT_B+
EXT_MIC
OPT_SEL_2
OPT_SEL_1
GND
RX_DATA
TX_DATA
GND
RSSI
RX_AUDIO/TX_AUDIO
20 PIN CONN
J403
INT_SPK+
NC
BOOT_CTRL
GND
MIC
GND
GND
18
OUT1NEG
3
OUT1POS
13
OUT2NEG
8
OUT2POS
6
SELECT
5
SVR
20
VCC1
11
VCC2
14
IN2NEG
15
IN2POS
4
MODE
NC1
2
NC2
7
NC3
9
NC4
12
NC5
19
TDA8547
U420
1
GND1
10
GND2
17
IN1NEG
16
IN1POS
C476
10uF
C475
10uF
100pF
C491
68
R450
R498
J403-20
10K
R499
10K
VR460
470K
R431
C448
0.1uF
C447
.022uF
R424
36K
36K
R472
470K
R423
C440
2.2uF
NU
C438
2.2uF
C450
VR450
R436
1K
100pF
C444
R435
2K
100pF
C471
100pF
C472
100pF
C473
VR449
R473
10
C442
0.1uF
VR434
VR433VR432
VR448VR446 VR447
R477
VR445
R434
1K
2
64
13
330
Q410
J403-5
J403-3
J403-4
0.1uF
R421
C443
2K
100pF
C441
C445
100pF
L400
390nH
J403-17
L401
390nH
J403-19
J403-16
J403-18
J403-2
C497
J403-1
100pF
100pF
C496
100pF
C495
100pF
C493
100pF
C494
100pF
C492
C490
100pF
5.6K
R471
J403-14
J403-15
J403-13
J403-12
J403-11
J403-9
J403-10
J403-8
J403-6
J403-7
5V
Vdda
OPT_SEL1
BOOT_CTRL
AUDIO
UNSWB+
SWB+
AUDIO_PA_ENA EXT_SPKR_SEL
OPT_SEL2
EXT_MIC
SCI_RX
SCI_TX
FLAT_RX_SND
SWB+
RSSI
INT_MIC
Figure 5-30. 700 MHz Audio Power Amplifier Schematic Diagram