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TEA1062 View Datasheet(PDF) - Contek Microelectronics

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TEA1062 Datasheet PDF : 13 Pages
First Prev 11 12 13
TEA1062/1062A LINEARINTEGRATED CIRCUIT
QR 4
QR 4 (1)
QR 4 (2)
VEE 9
VEE 9
VEE 9
(a)
(b)
(c)
Fig.11 Alternative receiver arrangement
(a) Dynamic earpiece.
(b) Magnetic earpiece.The resistor marked(1) may be connected to prvent distortion(inductive load)
(c) Piezoelectric earpiece.The earpiece marked(2) is requirred to increase the phase margin ( capacitive load)
Fig.12 Variation of gain with line urrent,with R6 as a parameter.
Gv
R6=
(dB)
0
-2
R9=20W
-4
(1) (2) (3)
-6
(1) R6= 78.7kW
(2) R6= 110kW
(3) R6= 140kW
0 20 40 60 80 100 120 140
Iline (mA)
Rexch(W)
400
600
800
R6(kW)
1000
36
100
78.7
Vexch(V)
48
140
110
93.1
82
60
120
102
Table 1 Values of resistor R6 for optimum line loss compensation,for various usual values of exchange
supply vloltage(Vexch) and exchange feeding bridge resistance( Rexch);R9=20W.
Contek Microelectronics Co.,Ltd.
11
CONTEK
http://www.contek-ic.com E-mail:sales@contek-ic.com
 

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