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US 2003/0192014 A1Published application
Simulator of dynamic circuit for silicon critical path debug
AssigneeSun Microsystems, Inc.
InventorChoon Ping Chng
Life of this patent
Estimating the term…
Abstract
An abstract register transfer level (RTL) model that simulates behavior of a dynamic circuit is created. The model is built upon an existing RTL with another level of abstraction capturing input transitions.
Claims18
A method of modeling operation of a dynamic circuit comprising:
- determining a previous input value;
- determining a next input value;
- combining the previous input value and the next input value to generate a modeled input value;
- and
- modeling an expected output value based upon the modeled input value.
2 more elements
A method of modeling operation of a dynamic circuit comprising:
- determining first and second previous input values;
- determining first and second next input values;
- combining the first previous input value and the first next input value to generate a first modeled input value;
- combining the second previous input value and the second next input value to generate a second modeled input value;
- and
- modeling first and second expected output values based upon the first and second modeled input values.
3 more elements
A method for troubleshooting a circuit in an integrated circuit chip comprised of:
- developing a simulation model comprised of predicted operational characteristics of the circuit, wherein the operational characteristics comprise operating frequency values, the developing a simulation model including
- determining a previous input value;
- determining a next input value;
- combining the previous input value and the next input value to generate a modeled input value;
- and
- modeling an expected output value based upon the modeled input value;
- testing the circuit under increasing frequency values until an error is seen;
- recording operational characteristics wherein the recorded operational characteristics include operating frequency, of the integrated circuit chip when the error is seen;
- and
- comparing the predicted operational characteristics with the recorded operational characteristics.
7 more elements
An apparatus for modeling the operation of a dynamic circuit comprising:
- means for determining a previous input value;
- means for determining a next input value;
- means for combining the previous input value and the next input value to generate a modeled input value;
- and
- means for modeling an expected output value based upon the modeled input value.
2 more elements
Dependencies are inferred from the claim text.