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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.

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First Claim