TEA1068T Philips Semiconductors, TEA1068T Datasheet - Page 14

• Manufacturer Part Number: TEA1068T
• Description: Versatile telephone transmission circuit with dialler interface
• Manufacturer: Philips Semiconductors

dbook, full pagewidth
Philips Semiconductors
1996 Apr 23
handbook, full pagewidth
Versatile telephone transmission circuit
with dialler interface
(1) May be connected to prevent distortion (inductive load).
(2) Required to increase the phase margin (capacitive load).
R9 = 20 .
a. Dynamic earpiece
with less than 450
impedance.
QR
QR
V EE
(dB)
G v
0
2
4
6
0
Fig.13 Variation of gain with line current, with R6 as a parameter.
20
b. Dynamic earpiece with
48.7 k
more than 450
Fig.12 Alternative receiver arrangements.
impedance.
QR
QR
78.7 k
40
110 k
60
140 k
14
with more than 450
c. Magnetic earpiece
80
QR
QR
impedance.
R6
100
(1)
120
I line (mA)
MBH137
d. Piezoelectric
140
QR
QR
earpiece.
Product specification
TEA1068
(2)
MBH136