Control of signal transmission

Details Control of signal transmission Control of signal transmission

1986-01-09

1989-11-21

Ng, Jin F.

Telephonic communications

Repeater

With frequency discriminator or negative impedance element

379347, 379338, H04B 336

Patent

active

048827495

ABSTRACT:
Circuits embodying the invention include apparatus for sensing the amplitude and the frequency of the signals received from one section of a telephone cable and for propagating onto the succeeding section of telephone cable only those received signals having an amplitude greater than a predetermined level and whose frequency is within the predetermined range.

REFERENCES:
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patent: 4358738 (1982-11-01), Kahn
patent: 4475209 (1984-10-01), Udren
patent: 4609878 (1986-09-01), Rodgers
"Design of an Integrated Circuit for the TlC Low-Power Line Repeater", by Paul C. Davis et al., IEEE Journal of Solid-State Circuits, vol. SC-14, No. 1, Feb. 1979.

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