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IL34118 - Voice Switched Speakerphone Circuit

Datasheet Summary

Description

The fundamental difference between the operation of a speakerphone and a handset is that of half-duplex versus full-duplex.

The handset is full duplex since conversation can occur in both directions (transmit and receive) simultaneously.

Features

  • of a feature phone.
  • Improved Attenuator Gain Range: 52 dB Between Transmit and Receive.
  • Low Voltage Operation for Line-Powered.

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Datasheet preview – IL34118

Datasheet Details

Part number IL34118
Manufacturer IK Semiconductor
File Size 830.51 KB
Description Voice Switched Speakerphone Circuit
Datasheet download datasheet IL34118 Datasheet
Additional preview pages of the IL34118 datasheet.

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Full PDF Text Transcription

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TECHNICAL DATA Voice Switched Speakerphone Circuit The IL34118 Voice Switched Speakerphone Circuit incorporates the necessary amplifiers, attenuators, level detectors, and control algorithm to form the heart of a high quality hands-free speakerphone system. Included are a microphone amplifier with adjustable gain and MUTE control, Transmit and Receive attenuators which operate in a complementary manner, level detectors at both input and output of both attenuators, and background noise monitors for both the transmit and receive channels. A Dial Tone Detector prevents the dial tone from being attenuated by the Receive background noise monitor circuit. Also included are two line driver amplifiers which can be used to form a hybrid network in conjunction with an external coupling transformer.
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