Noise reduced contactless parallel data transfer device and method thereof
US5594680A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 28, 1995 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Mar 28, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C7/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A contactless parallel data transfer device which is miniature, highly densed, and highly reliable having a coil block consisting of a first coil group installed in a portable memory and a coil block consisting of a second coil group installed in a data server for transferring access data in parallel between the portable memory (memory card, etc.) and the data server by contactless coupling, wherein the opposite coils of the first and second coil blocks are held close and opposite to each other on a contactless basis, and a parallel pulse group which is transferred in parallel between the both coil blocks is divided at least into a first parallel pulse group consisting of the first number of bits and a second parallel pulse group consisting of the second number of bits, and the parallel transfer timings of the both parallel pulse groups are different from each other, and an induced signal to the neighboring coils of each opposite coil pair of the first and second coil blocks is negated in the opposite phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.