Method and apparatus for demultiplexing electrical signals

Details Method and apparatus for demultiplexing electrical signals Method and apparatus for demultiplexing electrical signals

1980-03-04

1982-10-26

Brown, Thomas W.

Multiplex communications

Wide area network

Packet switching

329 50, 370100, 370112, 375111, H03D 318, H04J 306, H04L 704

Patent

active

043565620

ABSTRACT:
The specification describes a method and an apparatus for demultiplexing a multiplexed signal having a reference frequency into its original component signals including the steps of sampling the multiplexed signal at a controllable frequency which is greater than the reference frequency of the multiplexed signal to provide a series of samples, rearranging the samples of the series into different series representative of the original component signals, determining the phase differential between the reference frequency and the controllable frequency using the different series and then adjusting the controllable frequency toward synchronism with the reference frequency by an amount proportional to the phase differential.

REFERENCES:
patent: 3531777 (1970-09-01), West
patent: 3688196 (1972-08-01), Doelz
patent: 4015083 (1977-03-01), Bellisio
patent: 4054838 (1977-10-01), Tretter
patent: 4147895 (1979-04-01), Fenoglio
patent: 4213006 (1980-07-01), Gerges
patent: 4227252 (1980-10-01), Godard

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