Current frequency waveform transmitting on D.C. power lines

Details Current frequency waveform transmitting on D.C. power lines Current frequency waveform transmitting on D.C. power lines

1982-06-09

1985-05-28

Groody, James J.

Communications: electrical

Continuously variable indicating

Using a particular modulation

73304R, 340 59, 34087026, G08C 1916, G08C 1920, G08C 1912

Patent

active

045203598

ABSTRACT:
A frequency transmission system comprises a pulse train generator and a signal converter. The pulse train generator generates a pulse signal of a sufficiently short duration in response to oscillation frequency signals, and the signal converter circuit converts the pulse signal into a current signal and blunts the waveform of the converted signal by a capacitor to transmit through power supply lines.

REFERENCES:
patent: 2477370 (1949-07-01), Hana
patent: 2883650 (1959-04-01), Brockway
patent: 3006713 (1961-10-01), Klein
patent: 3339193 (1967-08-01), Epstein
patent: 3417337 (1968-12-01), Prasil
patent: 3417390 (1968-12-01), Turtle
patent: 3721830 (1973-03-01), Oishi
patent: 3818466 (1974-06-01), Honda
patent: 4164146 (1979-08-01), Duvall
patent: 4164706 (1979-09-01), Akita et al.

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