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PBL38813

Part Number	PBL38813
Manufacturer	Ericsson
Description	Voice-switched Speakerphone Circuit with built in loudspeaker amplifier
Published	Mar 22, 2005
Detailed Description	January 1998 PBL 388 13 Voice-switched Speakerphone Circuit with built in loudspeaker amplifier Description. The PBL 38...
Datasheet	PBL38813 PDF File

Overview

January 1998 PBL 388 13 Voice-switched Speakerphone Circuit with built in loudspeaker amplifier Description.
The PBL 388 13 contains all the necessary circuitry, amplifiers, detectors, comparator and control functions to implement a high performance, voice-switched, loudspeaking, ”hands-free ” telephone.
The gain dynamics (attenuation between channels) is selectable (25dB or 50dB) via a separate pin.
A background noise detector in the transmitting channel reduces the influence of continuous external noise signals to the switching .
The PBL 388 13 is designed for telephone systems that are either powered from the telephone line or from a mains powered constant voltage dc.
supply.
The circuit...

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