Method and apparatus for adjusting the phase of a digital signal

Details Method and apparatus for adjusting the phase of a digital signal Method and apparatus for adjusting the phase of a digital signal

1994-08-12

1998-08-04

Chin, Stephen

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

327161, H04L 700, H04L 2536, H04L 2540

Patent

active

057906114

ABSTRACT:
A method and apparatus for improving the phase granularity when changing the phase of a digital signal. The present invention doubles the phase shift granularity of a phase shifting system by either adding or not adding one-half unit of phase delay to the digital signal being phase shifted. When increasing phase delay is being added to the digital signal, no additional phase delay is added to the digital signal. When decreasing phase delay is being adding to the digital signal, one-half unit of phase delay is added to the digital signal. Thus, whenever a change is made between increasing or decreasing phase delay, a one-half unit phase delay is introduced which effectively doubles the phase delay granularity of the phase delay system at the point of phase delay reversal.

REFERENCES:
patent: 5022056 (1991-06-01), Henderson et al.
patent: 5313501 (1994-05-01), Thacker
patent: 5488641 (1996-01-01), Ozhan

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