UTCTEA1062N / TEA1062AN

LINEAR INTEGRATED CIRCUIT

QW-R108-011,A

LN

Leq

Vref

Rp

R1

C3

C1

100

µF

4.7

µF

REG

R9

20

Ω

Rp=16.2k

Ω

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.

Zline

R1

R9

R2

R3

R8

Zbal

Rt

IR

SLPE

Fig 4 Equivalent circuit of UTC TEA1062N/TEA1062AN

anti-sidetone bridge

Zline

R1

R9

R2

R8

Rt

IR

SLPE

Fig 5 Equivalent circuit of an anti-sidetone

network in a wheatstone bridge

configuration