Patent ID: 8209367
Filing Date: 2012-06-26
Classification: G06F

Abstract:
1. A random number generator comprising: an bits linear feedback shift register, or LFSR having an input and n outputs for outputting n output bits, where n is a given integer; at least one oscillator having an output, a feedback loop and at least one delay element introducing a variable delay into said feedback loop; and at least one sample and hold unit having at least one input coupled to the output of the oscillator, and at least one output coupled to the input of the LFSR, and a clock input receiving a sampling clock signal at a much lower frequency than the frequency of the oscillator, the generator being configured to vary the delay introduced by the delay element in the feedback loop of the oscillator as a function of a number q of feedback bits from among the n output bits of the LFSR, where q is an integer such that 1≦q≦n.