Method and apparatus for detecting interruption of an input signal with cancellation of offset level
US6831521B1 · kind B1 · utility
7Cited by
4References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2003 |
| Grant date | Dec 14, 2004 |
| Priority date | — |
| Expiry date | Jun 24, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/78
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An input branch of a loss-of-signal (LOS) detector is coupled to a first input of a comparator. A threshold branch of the LOS detector is coupled to a second input of the comparator. An operational amplifier is connected between the input branch and the threshold branch to couple an offset level from the input branch to the threshold branch. The offset level is then cancelled at the comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.