Browse Prior Art Database

Automatic Testing of Parallel Lines

IP.com Disclosure Number: IPCOM000041490D
Original Publication Date: 1984-Feb-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Nahata, P: AUTHOR

Abstract

The preceding article describes a method for short and open testing of parallel lines. Conditions may exist under which short-testing of parallel lines will produce erroneous results. In this article it is proposed that, for short-testing, voltage be applied to one end of a line while grounding the other line and sensing the voltage. If a short between the lines exists, then the voltage will fall below a certain minimum level. 1. A break in one of the lines under test also needs to be considered. This can be handled by modifying the switching network and also by making the short-testing a two-step procedure rather than a single-step. 2. Depending on the locations of opens it may not be possible to get proper results for shorts and replacement may be necessary prior to further testing.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 93% of the total text.

Page 1 of 2

Automatic Testing of Parallel Lines

The preceding article describes a method for short and open testing of parallel lines. Conditions may exist under which short-testing of parallel lines will produce erroneous results. In this article it is proposed that, for short-testing, voltage be applied to one end of a line while grounding the other line and sensing the voltage. If a short between the lines exists, then the voltage will fall below a certain minimum level. 1. A break in one of the lines under test also needs to be considered. This can be handled by modifying the switching network and also by making the short-testing a two-step procedure rather than a single-step. 2. Depending on the locations of opens it may not be possible to get proper results for shorts and replacement may be necessary prior to further testing. If there is a break in one of the two lines under test, then the voltage should be applied to one of the two lines while grounding the opposite end of the other line, as shown in the drawing. If the voltage does not fall below a certain level, then the voltage should be applied to the opposite end of the line to which voltage was being applied and grounding the other end of the second line. If the voltage falls below a predetermined level, then there is a short between the two lines. In the case illustrated, a short between the lines is verified in step 2 and not step 1 because of an open in line 1. This method may not detect shorts between the li...