TEA1062A データシートの表示（PDF） - Contek Microelectronics

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TEA1062A

LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE

Contek Microelectronics 

TEA1062/1062A LINEARINTEGRATED CIRCUIT

LN

Leq

Rp

R1

REG

VCC

Vref

C3

C1

R9

4.7 mF 100 mF Rp=16.2kW

20W

VEE

Leq=C3*R9*Rp

Fig.3 Equivalent impedance circuit

The anti- sidetone network for the ContekTEA1062/1062A 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 Contek TEA1062/1062A

anti-sidetone bridge

Fig 5 Equivalent circuit of an anti- sidetone

network in a wheatstone bridge configuration

Contek Microelectronics Co.,Ltd.

8

CONTEK

http://www.contek-ic.com E-mail:sales@contek-ic.com

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