What is kohavi algorithm?

What is kohavi algorithm?

What is kohavi algorithm?

Dr.Y.Narasimha Murthy.,Ph.D yayavaram@yahoo.com Kohavi algorithm : The path sensitization method and the Boolean difference methods are not practically feasible for multiple faults , even for circuits of ordinary moderate size.This is because both the methods consider only one fault at a time.and the total number of …

What is sensitized path?

The act of finding a set of solutions to the path predicate expression is called path sensitization.

What is D algorithm in ATPG?

The D algorithm is a deterministic ATPG method for combinational circuits, guaranteed to find a test vector if one exists for detecting a fault. It uses cubical algebra for the automatic generation of tests.

What is fault table method?

A method is developed for obtaining a highly compressed fault table for two-level combinational circuits. A set of operations is defined through which the minimal test set for detecting stuck-at faults is obtained from the compressed fault table.

What is stuck at 0 and stuck at 1 faults?

When a signal, or gate output, is stuck at a 0 or 1 value, independent of the inputs to the circuit, the signal is said to be “stuck at” and the fault model used to describe this type error is called a “stuck at fault model”.

What is path sensitization in VLSI?

The basic principle of the path sensitization method is to choose some path from the origin of the fault to the circuit output. A path is sensitized if inputs to the gates along the path are assigned values such that the effect of the fault can be propagated to the output.

What is ATPG in DFT?

Automatic Test Pattern Generation, or ATPG, is a process used in semiconductor electronic device testing wherein the test patterns required to check a device for faults are automatically generated by a program.

What is Podem?

PODEM (Path-Oriented Decision Making) is an Automatic Test Pattern Generation (ATPG) algorithm which was created to overcome the inability of D-Algorithm (D-ALG) to generate test vectors for circuits involving Error Correction and Translation.

What is a fault table in DSD?

3.2. It uses fault simulation to determine the possible responses to a given test in the presence of faults. The database constructed in this step is called a fault table or a fault dictionary.

How are faults diagnosed?

In the fault diagnosis literature, very often, analytical redundancy is referred to as model-based fault diagnosis. Using analytical redundancy, fault diagnosis is achieved by direct comparison between measured signals (from the actual system) and generated signals (estimated from a mathematical model of the process).

Why do CMOS circuits get stuck at faults?

This is because CMOS may experience a failure mode known as a stuck-open fault, which cannot be reliably detected with one test vector and requires that two vectors be applied sequentially.

What is stuck at fault model?

With a stuck at fault model you are applying a structural test approach. Instead of testing all combination of 1’s and 0’s to a VLSI device, you will test with a reduced set of test vectors. Stuck at Fault Models operate at the logic model of digital circuits.