U4055B1 Datasheet | TEMIC Semiconductors

U4055B/U4055B1 Low-Voltage Electronic Speech Circuit with Dialer Interface Description The U4055B electronic speech circuit is a linear integrated circuit for use in telephone and other line fed terminal equipment. It replaces the mon speech circuit with carbon microphone, hybrid transformer, sidetone equivalent and ear protection rectifiers. A low-cost electrodynamic transducer is used as the earphone. It contains all ponents necessary for amplification of signals and adaption to the line. Features .. D An electronic circuit replaces the microphone hybrid transformer D Symmetrical input for dynamic or piezo microphone D High performance through the use of dynamic...