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As supply voltage is reduced, a power constrained test clock can be sped up in spite of the increased delay of the circuit. However, a large reduction in voltage makes the operation structurally constrained, requiring the clock to slow down. We determine an optimum supply voltage that allows fastest clock speed for a given power limit. Examples show that the test time can be reduced by as much as...
Novel architectures for designing modulo 2n+1 subtractors are introduced, for both the normal and the diminished-one number representation of the operands. Zero-handling is also considered in the diminished-one operand representation case. The modulo 2n+1 subtractors for operands in the normal representation that are proposed are shown to be more efficient in area, delay and power dissipation than...
While the CMOS analog circuits can be designed with the minimum-gate-length of the fabrication process in the alpha-power law MOSFET model, the length of a MOSFET gate has been chosen to be a larger scale than the minimum-gate-length in the conventional Shockleypsilas square model. In this paper, we describe a 6-b 100 MSPS CMOS current steering digital-to-analog converter (DAC) with the alpha-power...
A delay-locked loop of multi-band selector with wide-locking range and low power dissipation is presented. The architecture of the proposed delay-locked loop consists of phase frequency detector, charge pump, band selector, multi-control delay line, and start-up circuit. The multi-band selector is used to extend operation frequency of delay-locked loop by switching the multi-control delay line. The...
Recent silicon process technology advancements have given chip designers integration capabilities never were possible before, and have led to a new wave of complex ASICs (applied specific integrated circuits). These advanced processes come with new challenges. This paper presents some of the challenges in deep submicron technologies, which require new design practices. We demonstrate some issues related...
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