Line driving system according to the characteristic of a transmi

Details Line driving system according to the characteristic of a transmi Line driving system according to the characteristic of a transmi

1996-11-19

1998-10-06

Powell, Mark R.

Television

Special applications

Manufacturing

348192, 375285, 375296, H04N 710, H04N 1700

Patent

active

058185097

ABSTRACT:
A line driving system according to the characteristic of a transmission medium is disclosed, including: a setup signal generator for generating a setup signal; an amplifier, connected to the setup signal generator, for amplifying an entire frequency band to a constant level, and changing the setup signal and a subscriber transmission signal; a frequency compensator, connected to the amplifier, for adjusting an amplification gain of a corresponding frequency; a line connector, connected to the frequency compensator and a cable, for connecting a driving signal to a transmission line medium; a setup signal receiver for receiving the transmitted setup signal; a clamp/signal detector, connected to the setup signal receiver, for detecting a (-) directional pulse signal of the setup signal, generating a signal clamped to a reference point, calculating a value based on a clamp level, and converting the value to a voltage value; a combination/discrimination/control generator connected to the amplifier and the frequency compensator, for generating a control signal adjusting an ampliation gain according to an output signal generated from the clamp/signal detector; and a system controller connected to the setup signal receiver and the clamp signal detector, for receiving the setup signal from a counterpart, requesting a setup, controlling the combination/discrimination/control generator, and managing the start and end of a setup procedure.

REFERENCES:
patent: 3781703 (1973-12-01), Duty
patent: 4507793 (1985-03-01), Adams
patent: 5329243 (1994-07-01), Tay

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