PBL 3852
(+Line)
DC-control
5
Mute
6
1
17
13
12
+
+
+
DC
supply
DC
supply
Ref.
Ref.
15
16
PBL 3852
3
11
2
7
14
18
9
8
10
4 +
DC1
DC2
Power
down
+
+
+
(-Line)
DTMF
Component list for application with line length regulation, 2x200Ω line feed.
R1 =
R2 =
-
-
C1 = -
C2 = 47µF
C3 = 47µF
C4 = 220nF
R3 = 100Ω
R4 = 15k
R5 = 15k
C5 =
-
R6 = DTMF level adj. C6 = 100nF
R7 = 47Ω C7 =
R8 =
-
-
C8 = 47nF
C9 = 47µF
C10 = 15nF
C11 = -
R9 = 620Ω
R10 = -
R11 = 3.9k
R12 = 130Ω
R13 = 2.4k
R14 = 24k
R15 = 18k
R16 = 180k
R17 = 13k
R18 = 62k
R19 = 910Ω
C12 = 1µF
C13 = 1µF
R20 =
-
R21 = 62k
R22 = 68Ω
R23 = 17k
R24 = 200Ω
R25 = 200Ω
Figure 33. Application with line length regulation, 2x200Ω line feed.
21
ERICSSON [ ERICSSON ]
