Method for detecting open circuits with a measurement device
US5977774A · kind A · utility
5Cited by
6References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 31, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Oct 31, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/54
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining whether a circuit under test is open is presented. A digital-to-analog converter is dithered to generate a known signal. This known signal is summed with an external attenuation signal which is brought into the system from a probe on the circuit under test. This summation is then measured by an analog-to-digital converter (ADC). If the known signal is not attenuated by the probe (i.e., the ADC measures essentially the known signal), we can conclude that the circuit is open.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.