Carrier frequency spectrum generator using logic level input pul

Details Carrier frequency spectrum generator using logic level input pul Carrier frequency spectrum generator using logic level input pul

1979-12-03

1982-02-23

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 70, 328 27, H04J 106

Patent

active

043171940

ABSTRACT:
An inverter accepts the true form of a high-frequency signal at its input and provides the complement thereof at its output. The true form is applied to a first input of a first NAND-gate and the complementary form is applied to a first input of a second NAND-gate. A second signal, having a repetition rate which is set, for example, by the channel spacing required in an FDM carrier system, is applied to the second inputs of said first and second NAND-gates. The second signal is thereby alternately switched between the first and second output terminals of said NAND-gates at a rate equal to the frequency of the high-frequency signal. The first and second output terminals of said NAND-gates are connected to the first and second end terminals, respectively, of the primary winding of an output transformer. The end terminals of the secondary winding of said transformer are connected to the load or utilization device. The output signal comprises a spectrum having a sin x/x envelope centered at the high-frequency w.sub.c. Spectral rays occur at the high frequency w.sub.c and are disposed on either side of w.sub.c at intervals equal in frequency to the pulse rate of said second signal.

REFERENCES:
patent: 3146400 (1964-08-01), Perlman
patent: 3247468 (1966-04-01), Pintell
patent: 3668327 (1972-06-01), Euchner et al.
patent: 3815030 (1974-06-01), Morrison

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