PBL 3852
(+Line)
Mute
6
R21
R20
DC-control
5
1
R24
C13
17
13
12
_
+
+
+
C12
R22
R25
DC
supply
DC
supply
Ref.
18
Ref.
15
16
PBL 3852
3
11
2
7
14
9
8
10
4 +
C8
C5
R10
R23
D1
R4
R3
C4
R19
DC1
DC2
R11
C6
R18
R9
R12
R17
Power
down
C3
C2
R5
R6
R7
R8
+
+
+
C7
+
R13
C10
C9
(-Line)
R15
DTMF input
R16
R14
Component list for application with standard line length regulation, 2x400Ω line feed and soft clipping.
R1 =
R2 =
-
-
C1 = -
C2 = 47µF
C3 = 47µF
C4 = 150nF
C5 = 47nF
C6 = 100nF
C7 = 2.2µF
C8 = 47nF
C9 = 47µF
C10 = 15nF
C11 = -
R3 = 100Ω
R4 = 9.1k
R5 = 33k
R6 = DTMF level adj.
R7 = 75Ω
R8 = 6.8k
R9 = 620Ω
R10 = 6.2k
R11 = 6.2k
R12 = 130Ω
R13 = 2.4k
R14 = 470k
R15 =330k
R16 =2.4M
R17 =13k
C12 = 1µF
C13 = 1µF
R18 = 62k
R19 = 910Ω
R20 =
R21 =
-
-
R22 = 150Ω
R23 = 17k
Without softclipping: Remove following components C5, C7, R8 and R10
Sweden: Alter following values R14 = 33k, R15 = 20k, R16 = 90k, R21= 130k
17k
R24 = 200Ω
R25 = 200Ω
Figure 32. Application with standard line length regulation, 2x400Ω line feed and soft clipping.
20
ERICSSON [ ERICSSON ]
