Azuro (uk) Limited

Simon Kinahan

Stephen Paul Wilcox

Ronald Ian Shipman

A method for estimating the average-case activity in a digital circuit includes the steps of identifying one or more predesignated types of circuit elements in the digital circuit, and propagating activity values through any identified circuit elements using a predetermined formula.

Estimation of average-case activity for circuit elements in a digital circuit

The present invention provides a method for estimating the average-case activity in a digital circuit. The method includes the steps of assigning initial activity values to outputs of flops in the digital circuit, and repeatedly updating the activity values in an iterative procedure until a predetermined termination criterion is met. The updating of the activity values uses a combination of standard probability updating techniques and predetermined formulae for obtaining the activity values of predesignated types of circuit elements in the digital circuit. The predesignated types of circuit elements include, for example, one or more of a clock-gated flop, an enable flop and a flop with a recirculation multiplexer.

Estimation of average-case activity for digital circuits

A method for estimating the average-case activity in a digital circuit includes the steps of identifying a state machine in the digital circuit, and propagating activity values through the state machine to obtain activity information at an output of a flop in the state machine using a predetermined formula.

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Cambridge, United Kingdom

Simon Kinahan