High Quality Content by WIKIPEDIA articles! With beginning of the year 1960 of the researchers of the Alsthom company had the idea to represent a size between 0 and 1 by a probability of presence of one 1 on a line. A multiplication then required nothing any more but one simple and logical (very cheap circuit to produce) at a very good speed: the estimate with 1% of the probability required only 10ms with a frequency of 10,000 Hz. Still it for that was necessary that the entries are decorrelees, which was carried out by a small auxiliary attachment containing a generator random and of an exclusive-OR gate (XOR).

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