Clock extraction circuit for a PCM signal

Details Clock extraction circuit for a PCM signal Clock extraction circuit for a PCM signal

1983-07-15

1985-07-23

Griffin, Robert L.

Pulse or digital communications

Spread spectrum

Direct sequence

328 72, H04L 704

Patent

active

045312222

ABSTRACT:
A clock extraction circuit for PCM NRZ signals which delivers substantially constant power and comprising at least one energy storage device charged by a constant current and discharged into a full wave amplifying circuit, the amplifying circuit delivering power to a filter which filters out the clock signal. This arrangement uses a passive tank circuit and ensures the clock signal from the NRZ data does not die out during periods of little or no clock content in the data stream.

REFERENCES:
patent: 3652947 (1972-03-01), Hollingsworth
patent: 3652948 (1972-03-01), Fierstien et al.
patent: 3699465 (1972-10-01), Pranke
patent: 3714597 (1973-01-01), Reynolds
patent: 3986053 (1976-10-01), Doemer
patent: 3986126 (1976-10-01), Gindi et al.
patent: 4275360 (1981-06-01), Gill et al.
patent: 4297595 (1981-10-01), Huellwegen

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