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參數(shù)資料
| 型號： | UTCTEA1062 |
| 廠商： | 友順科技股份有限公司 |
| 英文描述： | LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE |
| 中文描述： | 低壓電話傳輸電路的撥號界面 |
| 文件頁數(shù)： | 11/13頁 |
| 文件大小： | 113K |
| 代理商： | UTCTEA1062 |
UTC TEA1062/1062A
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
11
QW-R108-001,A
(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.
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
.
4
9
QR
V
EE
9
4
QR
V
EE
4
9
QR
V
EE
(2)
(1)
(a)
(b)
(c)
Fig.11 Alternative receiver arrangement
-6
-4
-2
0
0
20
40
60
80
100
120
140
Iline (mA)
÷
Gv
(dB)
R6=
T
R9=20
78.7k
110k
140k
(1) (2) (3)
(3)
(1)
(2)
R6=
R6=
R6=
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