Non-contact IC recording medium
US5353434A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Jun 4, 1991 |
| Grant date | Oct 4, 1994 |
| Priority date | — |
| Expiry date | Jun 4, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An IC recording medium for executing data transmission/reception without contact with a reader/writer. The non-contact IC recording medium comprises a first circuit for detecting a synchronization (sync) signal sent from a reader/writer to generate a first clock signal, a second circuit for generating a second clock signal having a predetermined frequency relationship with the clock signal for driving the data processing in a signal processing circuit incorporated therein, a third circuit for writing m (where m is an integer of 2 of greater) number items of transfer information output from the signal processing circuit using the second clock signal and reading them using the first clock signal, a fourth circuit for creating an interruption signal from the start bit in at least the first transfer information in the m number of items of transfer information to place the subsequent m number of items of transfer information in a wait state, and a fifth circuit for releasing the wait state of the subsequent m number of items of information by the fourth means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.