High speed differential signal detection
US6727732B1 · kind B1 · utility
2Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2002 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Oct 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/082
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and a circuit detect the presence of a high-speed signal, such as a high-speed differential signal, based on a software-programmable signal amplitude threshold. In one embodiment, when the amplitude threshold is exceeded, a current is generated to charge a capacitor. The voltage on the capacitor is compared to a second pre-set voltage in a low-speed comparator, which provides an output voltage indicating detection of the high-speed signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.