Patent · US Active

System and method for generating random numbers using parity feedback

US7797361B2 · kind B2 · utility

13Cited by

14References

35Claims

0Family size

Assignee

Micronas GmbH · DE

Inventors

Dejan Lazich · Blankenloch, DE
Herbert Alrutz · Glückstadt, DE
Miodrag Temerinac · Gundelfingen, DE
Steffen Schober · Langenau, DE

Key dates

Filing date	Sep 28, 2005
Grant date	Sep 14, 2010
Priority date	—
Expiry date	Apr 10, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH03K3/84
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A method for generating random numbers in which oscillating digital output signals of unequal or equal periodicity are generated by at least two ring oscillators, an external parity signal representing a logical state being generated when an odd number of the output signals take on a specified logical state, the external parity signal being fed back to an external parity input of each of the respective ring oscillators. Also, a random number generator having at least two ring oscillators made up of independently freewnning inverter chains with feedback having an odd number of series-connected inverters that generate oscillating digital output signals of unequal or equal periodicity, and having first panty signal generating mechanisms that generate an external parity signal representing a logical state when an odd number of the output signals take on a specified logical state.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.