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UTCTEA1062A View Datasheet(PDF) - Unisonic Technologies

Part NameDescriptionManufacturer
UTCTEA1062A LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE UTC
Unisonic Technologies UTC
UTCTEA1062A Datasheet PDF : 13 Pages
First Prev 11 12 13
UTCTEA1062/1062A LINEARINTEGRATEDCIRCUIT
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
(dB)
0
R6=¡Þ
-2
R9=20
-4
(1) (2) (3)
-6
(1) R6= 78.7k
(2) R6= 110k
(3) R6= 140k
0 20 40 60 80 100 120 140
Iline (mA)
Rexch()
400
600
800
1000
R6(k)
36
100
78.7
¡Á
¡Á
Vexch(V)
48
140
110
93.1
82
60
¡Á
¡Á
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=20.
UTC UNISONIC TECHNOLOGIES CO., LTD. 11
QW-R108-001,A
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