Method and device for focusing an electrical signal representative of an optical code
US6443360B1 · kind B1 · utility
13Cited by
10References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2001 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Apr 4, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
There are described a method and a device for focusing an analogue electrical signal representative of an optical code, which selectively emphasize the highest frequencies of the electrical signal. The emphasis is performed with linear phase, so that the relative positions of the peaks and valleys of the focused analogue electrical signal substantially remain unchanged. The focusing can comprise low-pass, high-pass and band-pass filtering. The focusing can be variable, and in particular, automatically variable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.