Circuit for simultaneous amplitude modulation of a number of sig

Details Circuit for simultaneous amplitude modulation of a number of sig Circuit for simultaneous amplitude modulation of a number of sig

1993-11-15

1995-07-18

Mis, David

Modulators

Amplitude modulator

Plural modulation

332149, 332152, 332168, 332178, 455 59, 455108, 455326, H03C 100, H03C 154

Patent

active

054345464

ABSTRACT:
A method for simultaneously imposing a single modulating signal on a number of constant frequency carriers includes applying the single modulating signal and all of the carriers to a doubly-balanced mixer circuit that produces sideband signals that are uncontaminated by the carriers. The sideband signals thus produced are then combined with signals proportional to the carriers in a linear circuit to obtain an output signal equivalent to a signal that would result from combining separately modulated carriers.

REFERENCES:
patent: 2835889 (1958-05-01), Dyer et al.
patent: 3260964 (1966-07-01), Whitehead et al.
patent: 3304515 (1967-02-01), Stieler
patent: 3586993 (1971-06-01), Buck
patent: 3651429 (1972-03-01), Ruthroff
patent: 3939419 (1976-02-01), Lindner
patent: 4039968 (1977-08-01), Emshwiller
patent: 4176319 (1979-11-01), Kahn
patent: 4481490 (1984-11-01), Huntley

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