1. A quadrature signal generator, comprising:
a coarse stage for generating output signals that have substantially a quadrature phase relationship, said coarse stage having
at least one 90/180 delay circuit having a first set of inverters and a second set of inverters, said second set of inverters
having an approximate delay of 90 degrees relative to said first set of inverters; and
at least one refinement stage for refining said quadrature phase relationship of said output signals from said coarse stage,
said refinement stage having at least one 0/180 delay circuit, said 0/180 delay circuit having a third series of inverters
and a fourth series of inverters, said fourth series of inverters having an approximate delay of 180 degrees relative to said
third series of inverters.
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