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

1979-12-20

1981-11-10

Brown, Thomas W.

H04M 322

Patent

active

043000215

ABSTRACT:
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 Modulation (PCM) processing circuitry of the line circuit for transmission signals and it is used by a level discriminator to generate supervisory signals.

REFERENCES:
patent: 3851108 (1974-11-01), Freimanis
"LSI Yields High Reliability", Wellenstein, IEEE Spectrum, Oct. 1979, pp. 78-81.

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