Phase modulated data transmission system

Details Phase modulated data transmission system Phase modulated data transmission system

1977-07-25

1980-08-12

Richardson, Robert L.

Pulse or digital communications

Repeaters

Testing

329110, H04B 116, H03D 300

Patent

active

042175518

ABSTRACT:
A data transmission system, particularly useful for transmission of computer data by radio frequency cables, makes use of a phase demodulator which eliminates the usual requirement for a coherent local oscillator for use in the demodulation process. The demodulator performs a phase-shifting operation on a phase modulated signal to arrive at an unmodulated carrier signal. The unmodulated carrier is sustained by use of a resonant circuit and used to demodulate the phase modulated signal.

REFERENCES:
patent: 2904683 (1959-09-01), Meyer
patent: 3764926 (1973-10-01), Rypinski, Jr.
patent: 3794928 (1974-02-01), Stump
patent: 3843931 (1974-10-01), Sarkilahti
patent: 3883806 (1975-05-01), DeLong
patent: 3906376 (1975-09-01), Bass
patent: 3970945 (1976-07-01), Knapp
patent: 3993956 (1976-11-01), Gilmore
patent: 4013967 (1977-03-01), Fassbind

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