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UTCTEA1062AN View Datasheet(PDF) - Unisonic Technologies

Part NameDescriptionManufacturer
UTCTEA1062AN LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE UTC
Unisonic Technologies UTC
UTCTEA1062AN Datasheet PDF : 13 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
UTC TEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
LN
Leq
Rp
R1
REG
VCC
Vref
C3
C1
R9
4.7 µF 100 µF Rp=16.2k
20
VEE
Leq=C3*R9*Rp
Fig.3 Equivalent impedance circuit
The anti-sidetone network for the UTCTEA1062N/TEA1062AN family shown in Fig.4 attenuates the signl received
from the line by 32 dB before it enters the receiving amplifier. The attenuation is almost constant over the whole
audio frequency range. Fig.5 shows a convertional Wheatstone bridge anti-sidetone circuit that can be used as an
alternative. Both bridge types can be used with either resistive or complex set impedances.
R1
R2
Zline
VEE
im
R3
IR
Rt
R9
R8
Zbal
SLPE
R1
R2
Zline
VEE
im
IR
Rt
R9
SLPE
R8
RA
Fig 4 Equivalent circuit of UTC TEA1062N/TEA1062AN
anti-sidetone bridge
Fig 5 Equivalent circuit of an anti-sidetone
network in a wheatstone bridge
configuration
UTC
UNISONIC TECHNOLOGIES CO., LTD. 8
QW-R108-011,A
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