HT34118A - Voice Switched Speakerphone Circuit

HTCSEMI

General 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) simultaneousiy.

Key Features

of a featurephone. PIN.

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HT34118A voice switched speakerphone circuit by HTCSEMI - Datasheet Preview

Datasheet Details

Part number	HT34118A
Manufacturer	HTCSEMI
File Size	1.00 MB
Description	Voice Switched Speakerphone Circuit
Datasheet	HT34118A Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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HT34118A Voice Switched Speakerphone Circuit The HT34118A 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.