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US 6,807,660 B1Granted
Vectorless instantaneous current estimation
AssigneeSequence Design, Inc.
InventorGerald L. Frenkil
Life of this patent
Estimating the term…
Abstract
A current waveform for an electronic circuit is calculated from a description of the circuit at a given level of abstraction without requiring a detailed simulation. In one embodiment, the waveform is estimated without using test vectors, and uses an analysis time step or “granularity” that is much shorter than a clock cycle. The method is applicable for calculating worst-case instantaneous current.
Claims11
A method for accurately calculating a current waveform of a circuit having one or more clock networks and multiple register and logic elements, using a circuit description of the circuit, comprising:
- performing an analysis of the circuit for each of the clock signals in said circuit, wherein the analysis comprises:
- setting states of sequential elements of the circuit according to a pre-determined circuit state;
- selecting a plurality of switching events in combinational logic elements that respond to the sequential logic elements;
- and
- calculating waveforms in the combinational logic elements resulting from the selected switching events;
- and
- constructing current waveforms based on the switching characteristics of the register and logic elements relative to transitions in the clock networks.
4 more elements
Dependencies are inferred from the claim text.