Printed circuit board test apparatus and method
US5570027A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1995 |
| Grant date | Oct 29, 1996 |
| Priority date | — |
| Expiry date | Apr 19, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/2805
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The apparatus and method operate by first generating a set of amplitudes for a constant current pulse. Each amplitude in the set is associated with one conductor on the reference printed circuit board and represents the amplitude which generates a determined voltage rise in that one conductor that is within a set range of a desired voltage rise for that one conductor. Each determined voltage rise representing the difference between a first voltage drop reading and a subsequent voltage drop reading taken across each conductor while the constant current pulse is applied. Once the set of amplitudes is generated, the apparatus and method generate a set of test voltage rises. Each test voltage rise is associated with one conductor on the test printed circuit board and represents the difference between the first and the subsequent voltage drop readings taken across that one conductor when the constant current pulse with the amplitude from the set of amplitudes for the corresponding conductor on the reference printed circuit board is applied to that one conductor. Once the test voltage rises are generated, then the apparatus and method compare the test voltage rise for each conductor on t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.