Circuit configuration for generating current pulses in the supply current of integrated circuits
US7017048B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2001 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | Aug 2, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/6872
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Differential power analysis on an integrated circuit is made more difficult by providing a circuit configuration for generating current pulses in the supply current of the integrated circuit. These additional pulses that are generated in the supply current are synchronous with the edges of the internal clock signal of the integrated circuit. In this case, the pulse shape and also the amplitude and the time profile are similar to the pulses in the supply current which are generated by other circuit sections, for example by processors or by some other digital logic, and in digital circuits, typically correspond to a charging curve of a capacitor via a resistor. The circuit generates these additional pulses by using a delay element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.