Interfering signal rejection circuitry and electronic article surveillance system and method employing same
US4975681A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1989 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | Dec 7, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2471
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A control arrangement both interrelates the frequency of transmitted signals to an interfering frequency and effects received signal processing also with relation to the interfering frequency in reaching enhanced insensitivity to undesired content of received signals. In particular respect of interference arising in an EAS system in relation to the local power frequency, the invention looks to a control arrangement which both interrelates the frequency of the transmitted signals to the local power frequency and effects received signal processing with relation to the local power frequency in reaching enhanced insensitivity to undesired content of received signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.