4 research outputs found
Gate circuits in the algebra of transients

We study simulation of gate circuits in the infinite algebra of
transients recently introduced by Brzozowski and Ésik. A transient
is a word consisting of alternating 0s and 1s; it represents a
changing signal. In the algebra of transients, gates process
transients instead of 0s and 1s. Simulation in this algebra is
capable of counting signal changes and detecting hazards. We study
two simulation algorithms: a general one that works with any initial
state, and a special one that applies only if the initial state is
stable. We show that the two algorithms agree in the stable case. We
also show that the general algorithm is insensitive to the removal of
state variables that are not feedback variables. We prove the
sufficiency of simulation: all signal changes occurring in binary
analysis are predicted by the general algorithm. Finally, we show
that simulation can be more pessimistic than binary analysis, if wire
delays are not taken into account. We propose a circuit model that we
conjecture to be sufficient for proving the equivalence of simulation
and binary analysis for feedback-free circuits.
A.: Simulation of gate circuits in the algebra of transients. Maveric Res
Abstract. We study simulation of gate circuits in algebra C recently introduced by Brzozowski and Ésik. A transient is a word consisting of alternating 0s and 1s; it represents a changing signal. In C, gates process transients instead of 0s and 1s. Simulation in C is capable of counting signal changes, and detecting hazards. We study two simulation algorithms: a general one, A, that works with any state, and Ã, that applies if the initial state is stable. We show that the two algorithms agree in the stable case. We prove the sufficiency of the simulation: all signal changes occurring in binary analysis are also predicted by Algorithm A.