| http://www.w3.org/ns/prov#value | - The phase detector 3 of FIG. 1 may include a plurality of modules and in the preferred embodiment as shown in FIG. 2 there are three modules shown; a first module 31, a second module 33 and an Nth module 35 where N is a positive integer and in the case of FIG. 2 is equal to 3.
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