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BL34118 - Voice Switched Speakerphone

Description

Filter output.

Output impedance is less than 50 ohms.

Filter input.

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 – BL34118

Datasheet Details

Part number BL34118
Manufacturer SHANGHAI BELLING
File Size 580.87 KB
Description Voice Switched Speakerphone
Datasheet download datasheet BL34118 Datasheet
Additional preview pages of the BL34118 datasheet.

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Full PDF Text Transcription

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www.DataSheet4U.com BL34118 Voice Switched Speakerphone Circuit BL34118 The BL34118 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.
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