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In order to explore the feasibility of the large scale subthreshold logic circuits and to clarify the lower limit of supply voltage (VDD) for logic circuits, the dependence of minimum operating(More)
The minimum operating voltage (VDDmin) of 90-nm CMOS ring oscillators (RO's) is investigated in order to clarify the lower limit of supply voltage (VDD) for logic circuits. The measured VDDmin is(More)