U4089B

更新时间： 2024-11-29 12:16:55

品牌	Logo	应用领域
爱特美尔 - ATMEL		手机
页数	文件大小	规格书
25页	649K
描述
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT

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中文翻译

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数据手册

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U4089B 数据手册

Features

• Adjustable DC Characteristics

• Adjustable Transmit and Receive Gain

• Symmetrical Input of Microphone Amplifier

• Anti-clipping in Transmit Direction

• Automatic Line-loss Compensation

• Built-in Ear Protection

• DTMF and MUTE Input

• Adjustable Side Tone Suppression Independent of Sending and Receiving

Amplification

• Integrated Amplifier for Loud-hearing Operation

• Anti-clipping for Loudspeaker Amplifier

• Improved Acoustical Feedback Suppression

• Selectable Line Impedance

Monolithic

Integrated

Feature Phone

Circuit

• Voice Switch

• Supply Voltages for All Functional Blocks of a Subscriber Set

• Operation Possible from 10-mA Line Current

Benefits

• Complete System Integration of Analog Signal Processing on One Chip

• Very Few External Components

U4089B-M

Applications

• Feature Phones

• Answering Machines

• Fax Machines

• Speaker Phones

Description

The telephone circuit U4089B-M is a linear integrated circuit for use in feature phones,

answering machines and fax machines. It contains the speech circuit, side tone

equivalent and ear protection rectifiers. The circuit is line-powered and contains all

components necessary for the amplification of signals and adaptation to the line.

An integrated voice switch with a loudspeaker amplifier enables loud-hearing or

hands-free operation. With an anti-feedback function, acoustical feedback during loud-

hearing can be reduced significantly. The generated supply voltage is suitable for a

wide range of peripheral circuits.

Figure 1. Simple Block Diagram

Speech

circuit

Audio

amplifier

Voice

Dialer

switch

Rev. 4570A–CORD–04/03

12 3 4 5 6 7...25

中文翻译

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