Carrier control method by using phase-pulse signals

Details Carrier control method by using phase-pulse signals Carrier control method by using phase-pulse signals

1977-10-07

1979-12-18

Hix, L. T.

Electrical transmission or interconnection systems

Superimposed unlike currents

Different frequencies or phase

340310A, G08C 1924

Patent

active

041796241

ABSTRACT:
A carrier control method using phase-pulse signals in which a plurality of terminal-selection channels and a plurality of returning channels having a predetermined phase width respectively are provided in one cycle of an alternating current carrier wave. At the center, a terminal-selection phase-pulse signal comprising a combination of existence and non-existence of a phase pulse for each terminal-selection channel is injected in the terminal-selection channels, corresponding to a code assigned to each terminal equipment. At the terminal equipment, the terminal-selection phase-pulse signal is received. When the code of the signal coincides with the code of the terminal equipment, a returning phase-pulse signal comprising a combination of existence and non-existence of a phase pulse for each returning channel is injected in the returning channels, corresponding to a datum stored at the terminal in the electrically readable state, and the signal is received at the center.

REFERENCES:
patent: 3011102 (1961-11-01), Balan
patent: 3482243 (1969-12-01), Buschbaum
patent: 3488517 (1970-01-01), Cowan
patent: 3721830 (1973-03-01), Oishi
patent: 3803491 (1974-04-01), Osborn
patent: 4012734 (1977-03-01), Jagoda
Flexible Control for Street Lighting, Electrical Times, 6-13-68, pp. 973-974.
Data Transmission Over Distribution Systems, Electrical Times, 3-12-70, pp. 55-58.
Remote-Control and Communications Systems, J. W. Townsend, Electronic Engineering, Oct. 1970, pp. 67-71.

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