# 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.