PBL38813
PBL38813 is Voice-switched Speakerphone Circuit with built in loudspeaker amplifier manufactured by Ericsson.
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, parator 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...
