Circuit for detecting digital signals, particularly for a system with an ASI field bus
US6690755B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1999 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Nov 9, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S40/124
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for detecting signals present on a bifilar voltage-supply and signal-transmission line, in which the signals are constituted by positive and negative variations of the supply potential of at least one of the wires of the line, the circuit including a low-pass filter connected to the two wires of the line in order to supply, at an output terminal of the filter, a constant reference potential substantially equal to the supply potential of a preselected one of the two wires, a first threshold comparator having a reference input terminal and a threshold input terminal connected, respectively, to the output terminal of the filter and to the preselected wire of the two wires, and a second threshold comparator having a reference input terminal and a threshold input terminal connected, respectively, to the preselected wire of the two wires and to the output terminal of the filter. The circuit is relatively simple, does not require synchronization signals, and can be formed as an integrated circuit, taking up a limited area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.