H - Electricity – 04 – M
Patent
H - Electricity
04
M
379/56, 379/71
H04M 1/76 (2006.01) H04B 3/04 (2006.01) H04B 3/36 (2006.01)
Patent
CA 1074473
IMPEDANCE SIMULATING REPEATER FOR TRANSMISSION LINES ABSTRACT A circuit for varying the amplification afforded to a-c signals transmitted through a transmission line in accordance with the length of that transmission line. Circuitry is pro- vided which establishes a control signal which is a function of the a-c losses of the transmission line. First and second networks vary an impedance simulating current and an impedance simulating voltage respectively in accordance with the control signal. The impedance simulating current also varies in accord- ance with the signal voltage across the transmission line and the impedance simulating voltage also varies in accordance with the signal current through the transmission line. The impedance simulating current is applied in shunt with the transmission line and the impedance simulating voltage is applied in series with the transmission line to thereby automatically adjust the repeater for operation with any transmission line to which it is connected.
319895
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