Line circuit controlled by a hall effect device

Details Line circuit controlled by a hall effect device Line circuit controlled by a hall effect device

H - Electricity

04

M

379/67

H04M 3/22 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 1141875

TITLE LINE CIRCUIT CONTROLLED BY A HALL EFFECT DEVICE ABSTRACT OF THE DISCLOSURE A circuit which performs both the supervisory functions and transmission functions of a line circuit under control of a Hall effect device. A Hall effect device operates in the magnetic field generated by the transmission transformer to produce a proportionate signal. This signal is used by the Pulse Code Modula- tion (PCM) processing circuitry of the line circuit for transmission signals and it is used by a level discriminator to generate supervisory signals.

366699

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