Phase lock loop preconditioning circuit

Details Phase lock loop preconditioning circuit Phase lock loop preconditioning circuit

1978-11-02

1980-09-09

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307208, 307269, 375110, 375120, H03K 117, H03K 5156

Patent

active

042220092

ABSTRACT:
A preconditioning circuit is inserted in series between a coded stream of data pulses and a standard commercially available phase lock loop of the type having a nonharmonic phase detector. The novel preconditioning circuit converts the input coded stream of data pulses which do not have a transition during each cell time into a stream of pulses having a transition during each data cell time to enable the nonharmonic phase lock loop to synchronize with the data cell time and to produce clock pulses synchronized with the data cell time.

REFERENCES:
patent: 3582795 (1971-06-01), Heick
patent: 3654492 (1972-04-01), Clark
patent: 3755748 (1973-08-01), Carlow et al.
patent: 3894246 (1975-07-01), Turgrim
patent: 4039960 (1977-08-01), Clark
patent: 4080576 (1978-03-01), Huber et al.

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