Method and apparatus for testing analog-to-digital and digital-to-analog code converters
US4266292A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1978 |
| Grant date | May 5, 1981 |
| Priority date | — |
| Expiry date | Nov 20, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/66
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for testing for faults in an analog-to-digital (A/D) section and a digital-to-analog (D/A) section of a code converter in a digital time division, multiplex telecommunications system are disclosed. The A/D section is tested by connecting a digital test pattern via the switching network to the D/A section and monitoring for faults by comparing the resulting output to a reference value. The A/D section is tested by interconnecting the A/D section to be tested between a first previously tested D/A section and a second previously tested D/A section and then connecting the digital test pattern to the first D/A section while monitoring the output of the second D/A section for faults.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.