PBL38814 Просмотр технического описания (PDF) - Ericsson
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PBL38814 Datasheet PDF : 14 Pages
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PBL 388 14
+
100 µF
6V
+ 100 µF
16 V
50 Ω
15nF
LOUDSPEAKER
+ supply
0V
Tx
signal
18
24
4
68nF
3
68nF
5
16
F3
+
19 21
20
22
PBL 388 14
Control
F6
23
220nF
17
47k
12 100nF
50k
13
68nF
11
820Ω
820Ω
150nF
150nF
1
2 F1
F2
8
F5
1 µF
15
F4
+
Ref.
6
9
10
7
14
33nF
MIC.
6.8nF
470 k
+ 100 µF
6V
+
2.2 µF/6V
+
100nF
2.2 µF/6V
4.7nF
Rx
signal
Figure 18. Application with ac. volume control.
22
PBL
388 14
19
15n
10Ω
20
BD131
15n
BD132
+
+
4 - 15 V
-
+ 1000µF
4Ω
Figure 19. External power amplifier
The power amplifier feedback loop can
be broken (pinns 19 and 20) thus making it
possble to insert external power transistors
to increase the audio output power. This
enables with external power supply an out-
put power of several watts fed into 4 - 16 ohm
loudspeaker. See. fig. 19.
11
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