9634832
Circuits design optimization using symbolic approach
A methodology and integrated system for the optimization of integrated circuits is presented. We propose the method that combines the symbolic analyzer and effective optimization algorithms to shorten the computation time. After selecting a circuit topology, the symbolic simulator SAGA2 is invoked to model the circuit. SAGA2 generates exact analytic expressions which describe the circuit's behavior. The model is then passed to the design optimization program. The optimization program sizes all elements to satisfy the performance constraints and a user-defined design objective. A forms-based user interface is provided to allow the designer to specify the problem easily. The system had been applied in the filter circuit design.
19542122
Comprehensive interconnect BIST methodology for virtual socket interface
Comprehensive interconnect BIST achieves 100% fault coverage on net faults and driver faults without any prerequisitive assumption on the connection configuration and the fault-free and faulty behavior of the interconnects. Guidelines are derived and structure maps are proposed to achieve the goal.
3446277
A methodology for fault model development for hierarchical linear systems
In this paper, a methodology to develop fault models for hierarchical linear systems which are composed of operational amplifiers (OP) is demonstrated and presented. The methodology at first presents a transfer function model for the open-loop OP based on analysis of element faults at the transistor level. Then it derives a transfer function model for the closed loop OP based on the derived open-loop OP level model, again a higher level fault model for a module which is composed of closed loop OPs. The models can handle ac faults. The benchmark state-variable filter is used as an example to demonstrate for this methodology. An application of the derived models to Monte Carlo simulation to save computation time is also demonstrated.
31241054
A linear optimal test generation algorithm for interconnect testing
3116001
All digital built-in delay and crosstalk measurement for on-chip buses
This paper proposes an all digital on-chip bus delay and crosstalk measurement methodology. A diagnosis procedure is derived to distinguish the delay faults in drivers, receivers, and wires. The crosstalk profile is plotted by monitoring the changes in delay with the presence of the crosstalk. The distinguished features include all digital design and low hardware overhead. The SPICE simulation results prove the feasibility of the methodology.
26702437
Fault diagnosis for linear analog circuits
This paper presents a novel scheme to diagnose single and double faults for linear analog circuits. The scheme first proposes a simple transformation procedure to transform the tested linear analog circuit into a discrete signal flow graph, then constructs "diagnosing evaluators", which model the faulty components, to form a diagnosis configuration to diagnose the faults through digital simulation. This saves much computation time. Furthermore, a simple method to un-power the OP's is also proposed to differentiate equivalent faults. The scheme can diagnose faults in passive components as well as faults in OP's.
36792276
Robust fuzzy control of nonlinear systems using shape-adaptive radial basis functions
Recently, various adaptive fuzzy control schemes have been proposed to deal with nonlinear systems whose dynamics are poorly understood by using the parameterized fuzzy approximators. However, most of the schemes presented so far can only tune the parameters, which appear linearly in the parameterized fuzzy approximators. The major disadvantage is that the desired approximation error may not be warranted and consequently, the control performance could be influenced. In this paper, we tune not only the linear parameters but also the parameters, which appear nonlinearly in the fuzzy approximators, to reduce the approximation error and to improve control performance. The proposed adaptive controller ensures global stability of the overall adaptive system and achieves desired tracking.