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US 7,681,153 B2Granted
Estimating static power consumption of integrated circuits using logic gate templates
AssigneeInternational Business Machines Corporation
InventorsCedric Lichtenau, Alberto Garcia-Ortiz, Norman J. Rohrer
Life of this patent
Estimating the term…
Abstract
A method, system and computer program product for estimating a static power consumption of an integrated circuit are disclosed. The static power consumption of a cell of the integrated circuit is characterized based on contributions of an input node(s) and an output node(s) of the cell. A contribution considers a leakage weight and a leakage probability of a node. A logic template of the cell may be created to better represent a contribution of an internal node to the static power consumption of the cell.
Claims17
A method for estimating a static power consumption of an integrated circuit, the method comprising:
- dividing the integrated circuit into at least one cell;
- characterizing a static power consumption of the at least one cell based on a contribution of at least one input node and a contribution of at least one output node of the cell, each contribution representing a multiplication of a leakage coefficient and a probability of the at least one input node and the at least one output node;
- determining a value of the leakage coefficient of the at least one input node and the at least one output node;
- determining a value of the probability of the at least one input and at least one output node;
- and
- calculating the static power consumption of the cell to determine the static power consumption of the integrated circuit using a computer;
- wherein the leakage coefficient of the at least one input node and at least one output node is determined as a coordinate of an orthogonal projection of a vector representing the static power consumption of the cell into a base of vectors representing the at least one input node, the at least one output node and a constant;
- and
- replacing a gate netlist of the cell with a logic gate template by adding an internal node besides the input node and the output node of the cell.
6 more elements
A system for estimating a static power consumption of an integrated circuit, the system comprising:
- means for dividing the integrated circuit into at least one cell;
- means for characterizing a static power consumption of a cell based on a contribution of at least one input node and a contribution of at least one output node of the cell, each contribution representing a multiplication of a leakage coefficient and a probability of the at least one input node and the at least one output node;
- means for determining a value of the leakage coefficient of the at least one input node and the at least one output node based on the following formula:
- BTBa=BTy
- where B denotes the base as a matrix, BT denotes a transpose of matrix B, y denotes the vector representing the static power consumption, and a denotes the leakage coefficient;
- means for determining a value of the probability of the at least one input and at least one output node;
- and
- means for calculating the static power consumption of the cell to determine the static power consumption of the integrated circuit;
- wherein the leakage coefficient of the at least one input node and the at least one output node is determined as a coordinate of an orthogonal projection of a vector representing the static power consumption of the cell into a base of vectors representing the at least one input node, the at least one output node and a constant.
6 more elements
A computer program product comprising:
- computer readable program code stored in a computer readable storage device, the computer readable program code, when executed by a computer system, is configured to:
- divide an integrated circuit into at least one cell;
- characterize a static power consumption of a cell based on a contribution of at least one input node and a contribution of at least one output node of the cell, each contribution representing a multiplication of a leakage coefficient and a probability of the at least one input node and the at least one output node;
- determine a value of the leakage coefficient of the at least one input and at least one output node;
- determine a value of a probability of the at least one input and at least one output node;
- and
- calculate the static power consumption of the cell to determine the static power consumption of the integrated circuit;
- wherein the leakage coefficient of the at least one input node and the at least one output node is determined as a coordinate of an orthogonal projection of a vector representing the static power consumption of the cell into a base of vectors representing the at least one input node, the at least one output node and a constant;
- and
- replace a gate netlist of the cell with a logic gate template by adding an internal node besides the at least one input node and the at least one output node of the cell.
7 more elements
Dependencies are inferred from the claim text.