Multi-line, multi-mode modulator using bandwidth reduction for d

Details Multi-line, multi-mode modulator using bandwidth reduction for d Multi-line, multi-mode modulator using bandwidth reduction for d

1975-11-10

1977-01-11

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

178 66A, 325163, 332 9R, 332 11R, 332 16R, 332 21, 332 22, H03C 302, H04L 2720

Patent

active

040030016

ABSTRACT:
A frequency shift keyed (FSK) modulator capable of substantially simultaneously modulating a plurality of binary encoded data signals at different baud rates and modulation frequencies for substantially simultaneous transmission over a plurality of communication lines and in which the modulated signals are of narrow bandwidth thus requiring the same simple RC filter for all lines regardless of the baud rates or signalling frequencies used.

REFERENCES:
patent: 3773975 (1973-11-01), Koziol
patent: 3787785 (1974-01-01), Bass

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