Repeater for transmission lines of differing lengths

Details Repeater for transmission lines of differing lengths Repeater for transmission lines of differing lengths

1975-03-20

1976-11-02

Cooper, William C.

179 16F, H04B 336

Patent

active

039899071

ABSTRACT:
A circuit for varying the amplification afforded to a-c signals transmitted through a transmission line in accordance with the a-c losses of that transmission line. Gain control circuitry is provided which varies the magnitude of amplifying voltages and currents inserted into the transmission line in accordance with the a-c losses of that transmission line. The gain control circuitry is comprised of a line resistance sensor which establishes a control signal which is a function of the a-c losses of the transmission line. This control signal is applied to the remainder of the gain control circuitry to vary the magnitude of voltages and currents inserted into the transmission line in accordance with that control signal. As a result, the gain control circuitry automatically adjusts the gain of a repeater in accordance with each transmission line connected thereto.

REFERENCES:
patent: 3706862 (1972-12-01), Chambers, Jr.
patent: 3731012 (1973-05-01), Shaffer
patent: 3781481 (1973-12-01), Shaffer et al.
patent: 3818151 (1974-06-01), Chambers, Jr. et al.
patent: 3851108 (1974-11-01), Freimanis
patent: 3903378 (1975-09-01), Lee et al.

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