By Thomas D. Burd
ISBN-10: 1461352827
ISBN-13: 9781461352822
ISBN-10: 1461508754
ISBN-13: 9781461508755
This paintings begun in 1995 as an outgrowth of the InfoPad venture which confirmed us that during order to lessen the strength intake of a conveyable multimedia terminal that anything needed to be performed in regards to the intake of the microprocessor subsystem. The layout of the InfoPad tried to lessen the necessities of this normal pur pose processor by means of relocating the computation into the community or by way of hugely optimized built-in circuits, yet despite those efforts it nonetheless used to be an enormous client of strength. the explanations for this turned obvious as we decided that the power required to accomplish a functionality in committed can be a number of orders of importance under that ate up within the InfoPad microprocessor. We consequently set out on a whole fledged assault on all elements of the microprocessor strength intake [1 J. After significant research it grew to become transparent that although larger circuit layout and a circulation coated structure could help in our target of strength aid, that the largest earnings have been to be chanced on through working at diminished voltages. For the busses and VO this might be finished with no major degradation of the processor functionality, yet this used to be no longer an easy resolution whilst utilized to the center of the processor sub method (CPU and memory).
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13) where kvcontains the technology dependence. 21J. 1 as the number of opemtions that can be performed in a given time. e. 14) The critical path delay can be related back to the previous delay model by summing up the delay over all M gates in the critical path: Critical Path Delay:: ~D M ~ CLi 2 . L... e. number of gates), and average values for CL and Ware used. 16) Typical units for opemtions per clock cycle are MIPSlMhz, and SPECint95/MHz when opemtions are respectively defined as instructions and benchmark progmms.
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A. Stratakos, S. Sanders, and RW. Brodersen, "A Low-voltage CMOS DCDC Converter for Portable Battery-operated Systems", Proceedings ofthe Twenty-Fifth IEEE Power Electronics Specialist Conference, June 1994, pp. 619-626. A. D. Thesis, University of California, Berkeley, Document No. UCBIERL M97/ 14,1997. A. D. Thesis, University of California, Berkeley, 1998. 1 The Need/or Energy Efficiency The explosive proliferation of portable electronic devices has compelled energy-efficient VLSI and system design to provide longer battery run-times, and more powerful products that require ever-increasing computational complexity.
Energy Efficient Microprocessor Design by Thomas D. Burd
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