Device for the suppression of a pilot frequency in a multiplex t

Details Device for the suppression of a pilot frequency in a multiplex t Device for the suppression of a pilot frequency in a multiplex t

1973-10-18

1976-04-06

Stewart, David L.

H04J 110

Patent

active

039491730

ABSTRACT:
A device for suppressing a pilot wave in a spectrum of frequencies by subtraction of an auxiliary frequency adjusted in frequency, in phase, and in amplitude to adequate values, used in frequency multiplex telephone transmission systems, containing two pilot frequencies in cases where maintaining either one or several of these frequencies would lead to disturbances.

REFERENCES:
patent: 716955 (1902-12-01), Stone
patent: 1256889 (1918-02-01), Espenschied
patent: 1578490 (1926-03-01), Weagant
patent: 3696429 (1972-10-01), Tressa
patent: 3714595 (1973-01-01), Denenberg
patent: 3810182 (1974-05-01), White
Western Electric Engineering, Vol. 16, No. 1, Jan. 1972, "A Method of Suppressing Pilot Frequencies . . .", by J. Grossman.
Electronic Design, Vol. 12, No. 15, July 1964, "A Primer on Phase-Locked Loops", by W. Lew.
IEEE Transactions on Broadcast and Television Receivers, Vol. BTR-16, No. 4, Nov. 1970, "On An Inductorless FM Stereo Multiplex Circuit . . ." , by W. Padgett.

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