Side-band generator

Details Side-band generator Side-band generator

1990-04-02

1992-10-27

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

332170, 455109, H03C 152

Patent

active

051596130

ABSTRACT:
An upper and lower side-band generator comprised of a combination of combinational logic circuits. In a preferred embodiment the invention utilizes a substantially square wave sync output associated with carrier and modulator signal generators. A lower side-band signal is generated by synchronizing the transitions of a modulator signal with the transitions of a carrier signal, mixing the synchronized signal with the carrier signal, and filtering the resulting mixed signal. An upper side band signal is generated by synchronizing the carrier and modulator signals, delaying the resulting synchronized signal, and mixing the delayed, synchronized signal and the carrier signal.

REFERENCES:
patent: 3317840 (1967-05-01), Guttman et al.
patent: 3501594 (1970-03-01), Thrasher et al.
patent: 3605017 (1971-09-01), Chertok et al.
patent: 3611144 (1971-10-01), Harmon, Jr.
patent: 3806655 (1974-04-01), Hekimian et al.
patent: 3955143 (1976-05-01), Collins
patent: 4050024 (1977-09-01), Winston, IV
patent: 4310920 (1982-01-01), Hayes
Articles: Signetics, "1987 Linear Data Manual vol. I: Communications" pp. 4-79-4-86.
"Communication Systems", 2nd Ed., Simon Haykin, Published by John Wiley & Sons, pp. 137-149.
"Communication Systems, An Introduction to Signals and Noise in Electrical Communication", 3rd Ed., A. Bruce Carlson, Published by McGraw-Hill Book Co. pp. 213-218.

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