Title: Phase modulated data transmission system

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.

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Inventors: Entenman, Alan (Hicksville, NY, US)

Application Number: 818394
Filing Date: 1977-07-25
Publication_date: 1980-08-12
Assignee: Intech Laboratories, Inc. (Bohemia, NY)
Primary Class(es): 375/327 329/345
Other Classes:
US Patent Ref:

2904683	Sep, 1959	Meyer	329/104.
3764926	Oct, 1973	Rypinsk, Jr.	329/104.
3794928	Feb, 1974	Stump	325/320.
3843931	Oct, 1974	Sarkilahti	329/104.
3883806	May, 1975	DeLong	325/320.
3906376	Sep, 1975	Bass	329/104.
3970945	Jul, 1976	Knapp	329/104.
3993956	Nov, 1976	Gilmore	325/320.
4013967	Mar, 1977	Fassbind	329/104.

Other Refs:
Primary Examiner: Richardson, Robert L.
Assistant Examiner: Masinick, Michael A.
Attorney: Hopgood, Calimafde, Kalil, Blaustein & Lieberman