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The Devil's Staircase as a method of comparing injection-locked frequency divider topologies

In this paper, we outline an experimental technique for rapidly and accurately measuring the Devil's Staircase structure of lockings in an injection-locked frequency divider (ILFD). This technique uses a P.C., a CMOS oscillator, a function generator and a frequency counter. We describe an analysis of the method and also include a discussion of the experimental results and their significance to today's frequency division circuits.