Encoding device
US5995629A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1997 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Aug 15, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An encoding device includes an encoding unit and an output register downstream of the encoding unit. During a second time period, encoded output data are formed from input data fed to the encoding unit and are written into the output register. After the second time period elapses, no further data are fed to the output register, but power consumption of the output register must not alter. The encoding unit continues to generate output data until a first time period elapses. The encoding device prevents an external observer from drawing any conclusions from the power consumption of the encoding device as to the actual generating period of the encoded output data in the output register.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.