Download Computer-Aided Design Techniques for Low Power Sequential by José Monteiro, Srinivas Devadas PDF

By José Monteiro, Srinivas Devadas

Rapid raises in chip complexity, more and more speedier clocks, and the proliferation of transportable units have mixed to make strength dissipation a massive layout parameter. the facility intake of a electronic process determines its warmth dissipation in addition to battery lifestyles. For a few structures, energy has develop into the main severe layout constraint.
Computer-Aided layout suggestions for Low energy Sequential LogicCircuits offers a strategy for low energy layout. The authors first current a survey of ideas for estimating the common energy dissipation of a common sense circuit. on the common sense point, energy dissipation is without delay concerning standard switching task. A symbolic simulation technique that adequately computes the common switching task in good judgment circuits is then defined. this technique is prolonged to deal with sequential common sense circuits through modeling correlation in time and through calculating the chances of current nation strains.
Computer-Aided layout concepts for Low strength Sequential LogicCircuits then provides a survey of how you can optimize good judgment circuits for low strength dissipation which goal lowered switching job. a style to retime a sequential good judgment circuit the place registers are repositioned such that the final glitching within the circuit is minimized is usually defined. The authors then aspect a robust optimization process that's in line with selectively precomputing the output common sense values of a circuit one clock cycle earlier than they're required, and utilizing the precomputed price to lessen inner switching task within the succeeding clock cycle.
provided subsequent is a survey of tools that decrease switching task in circuits defined on the register-transfer and behavioral degrees. additionally defined is a scheduling set of rules that reduces strength dissipation by means of maximising the inaction interval of the modules in a given circuit.
Computer-Aided layout innovations for Low strength Sequential LogicCircuits concludes with a precis and instructions for destiny research.

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19. 20. Gates = TopologicaLSort( Network) ; for each gi in Gates { if gi is a primary input then { TimePoints = { (O,J;(O)), (t,J;(t)) } ; ei,t = /;(0) E9 /;(t) ; } else { ~ = delay of gi ; TimePoints = NIL(LIST) ; for each input gj of gi (gil'" ·,gim ) { for each time point (k,/j(k)) of gj { TimePoints = InsertInOrder ( TimePoints, (k,/j(k)) ) ; } } /* gi is the Boolean function of gate gi with respect to its immediate inputs */ J;(O) = gi(f;1 (0)", '/im(O)) ; 1=0; for each new time point k in TimePoints { J;(k +~) = gi(f;1 (k),·· '/im(k)) ; ei,k+b.

6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. Gates = TopologicaLSort( Network) ; for each gi in Gates { if gi is a primary input then { TimePoints = { (O,J;(O)), (t,J;(t)) } ; ei,t = /;(0) E9 /;(t) ; } else { ~ = delay of gi ; TimePoints = NIL(LIST) ; for each input gj of gi (gil'" ·,gim ) { for each time point (k,/j(k)) of gj { TimePoints = InsertInOrder ( TimePoints, (k,/j(k)) ) ; } } /* gi is the Boolean function of gate gi with respect to its immediate inputs */ J;(O) = gi(f;1 (0)", '/im(O)) ; 1=0; for each new time point k in TimePoints { J;(k +~) = gi(f;1 (k),·· '/im(k)) ; ei,k+b.

1: Example circuit for symbolic simulation. 2: Symbolic network for a zero delay model. 1 Symbolic Simulation We build a symbolic network from the symbolic simulation of the original logic circuit over a two input vector sequence. The symbolic network is a logic circuit which has the Boolean conditions for all values that each gate in the original network may assume at different time instants given this input vector pair. If a zero delay model is used, each gate in the circuit can only assume two different values, one corresponding to each input vector.

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