Low-Power CMOS Circuits: Technology, Logic Design and CAD Tools

By Christian Piguet

The ability intake of microprocessors is likely one of the most vital demanding situations of high-performance chips and conveyable units. In chapters drawn from Piguet's lately released Low-Power Electronics layout, Low-Power CMOS Circuits: expertise, common sense layout, and CAD instruments addresses the layout of low-power circuitry in deep submicron applied sciences. It presents a centred reference for experts fascinated by designing low-power circuitry, from transistors to common sense gates.

The publication is prepared into 3 huge sections for handy entry. the 1st examines the heritage of low-power electronics in addition to a glance at rising and attainable destiny applied sciences. It additionally considers different applied sciences, similar to nanotechnologies and optical chips, which may be valuable in designing built-in circuits. the second one half explains the ideas used to lessen strength intake at low degrees. those comprise clock gating, leakage aid, interconnecting and conversation on chips, and adiabatic circuits. the ultimate part discusses numerous CAD instruments for designing low-power circuits. This part contains 3 chapters that exhibit the instruments and low-power layout concerns at 3 significant businesses that produce common sense synthesizers.

Providing distinct examinations contributed by way of best specialists, Low-Power CMOS Circuits: know-how, good judgment layout, and CAD instruments provides authoritative info on how one can layout and version for prime functionality with low strength intake in glossy built-in circuits. it's a must-read for someone designing smooth desktops or embedded structures.

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Purdue. edu. ) the most conclusions are summarized subsequent: 1. For the well-designed units (with very skinny silicon physique and oxide layers that supply solid electrostatics), S/D tunneling units an final scaling restrict that's good less than 10 nm. 2. S/D tunneling dominates OFF-current within the units at scaling restrict, and it will probably play a massive position within the ON-state of ballistic units. three. as a result of S/D tunneling, the sub-threshold slope saturates at low temperature (see determine four. 2). for this reason, the leakage present within the OFF-state should still be excessive even at low temperature. We additionally stumbled on that for a double-gate MOSFET with a 1-nm-thick silicon physique and nil. 6-nm(equivalent)thick oxide layers, S/D tunneling units a scaling restrict of L = five nm if we require that the subthreshold swing Subthreshold swing (mV/dec) three hundred 250 two hundred Tsi = four nm one hundred fifty Tsi = 1 nm a hundred 50 three 6 10 15 Channel size (nm) 20 determine four. 2 The subthreshold swing vs. temperature. The simulated machine constitution is a double-gate MOSFET with zero. 6-nm(equivalent)-thick oxide layers. silicon physique thicknesses (1 nm and four nm) are followed during this simulation. the cast curves are for the semiclassical Boltzmann simulation (without S/D tunneling), whereas the dashed curves are for the quantum NEGF simulation (with S/D tunneling). (Obtained from J. Wang and M. Lundstrom, Does source-to-drain tunneling restrict the final word scaling of MOSFETs? IEEE Int. Electron. units assembly (IEDM), Tech. Dig. , pp. 707–710, San Francisco, CA, Dec. 2002. With permission. ) © 2006 via Taylor & Francis team, LLC 9537_Book. fm web page five Friday, July eight, 2005 1:31 PM 4-5 Microelectronics, Nanoelectronics, and the way forward for Electronics 2000 1750 Ids (µA/µm) 1500 1250 a thousand 750 Ballistic Intrinsic Ballistic + Extrinsic Rs Scattering + Extrinsic Rs Scattering Intrinsic 500 250 zero zero zero. 1 zero. 2 zero. three zero. four Vds (V) i e determine four. three the head curve is the intrinsic ballistic present I ball , and the dashed curve is I ball , so the pinnacle curves symbolize the ballistic intrinsic equipment. the ground are for intrinsic machine with scattering. The curve with sq. i e markers represents I scatt , and the fourth curve is I scatt . (Obtained from S. Hasan, J. Wang, and M. Lundstrom, gadget layout and production concerns for 10nm-scale MOSFETs: a computational research, reliable kingdom Electronics, forty eight, 6, 867–875, 2004. With permission. ) is smaller than a hundred mV/dec and the ON-OFF present ratio is greater than a hundred. evidently, shall we have diversified standards to figure out the last word scaling restrict of a MOSFET. Likharev [25] proposed a criterion that the voltage achieve of a CMOS inverter is bigger than one, and used it to discover a scaling restrict of L = 2 nm. So extremely important questions come up: How is the scaling restrict of a MOSFET decided? what's the worst functionality of a transistor that may be accredited through a really huge scale integration (VLSI) circuit fashion designer to construct an IC chip? transparent solutions to those questions require cooperation among machine researchers and circuit engineers. four. four sensible Limits of the Silicon MOSFET part four.

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