Analog noise generator

• US 4,176,399 A
• Filed: 04/21/1978
• Issued: 11/27/1979
• Est. Priority Date: 05/06/1977
• Status: Expired due to Term

• Current Assignee: Aerospatiale Societe Nationale Industrielle
• Original Assignee: Aerospatiale Societe Nationale Industrielle
• Inventors: Hoffmann, Jean-Claude, Crabere, Henri, Voisin, Norbert, Castanie, Francis, Verdier, Jean-Pierre
• Primary Examiner(s): Smith, Jerry
• Application Number:
  US05/898,686
• Time in Patent Office: 585 Days
• Field of Search: 364/717, 331/78
• US Class Current: 708/250
• CPC Class Codes: H03K 3/84 Generating pulses having a predetermined statistical distribution of a parameter, e.g. random pulse generators
• CPC Class Codes: H04L 9/0662 with particular pseudorandom sequence generator

Abstract

The present invention relates to a binary random noise generator for the stochastic coding of digital or analog information, comprising a comparator having two inputs, one of which receives a reference voltage and the other a random analog noise coming from a source of noise, said comparator supplying at its output a binary signal with random transitions, said generator comprising a clock and a logic system which, on the one hand, effect the sampling of the binary signal with random transitions in synchonism with the frequency of said clock and, on the other hand, ensure the strict equiprobality of the two logic states of said binary signal with random transitions, without increasing the radius of correlation. The invention is more particularly applied to the stochastic coding of information with a view to calculation or transmission, with equidistribution of binary variable.

Claims

1. A binary random noise generator for the stochastic coding of digital or analog information, comprising:

means for generating a binary signal with random transitions;

means for sampling said binary signal;

a clock generating a clock signal;

means for synchronizing said sampling means by said clock signal;

a divider dividing said clock signal by two;

an exclusive OR gate having two inputs, one of said inputs receiving the signal from said by-two divider and the other of said inputs receiving the signal from said sampling means, whereby the output of said exclusive OR gate has a strict equiprobability of its two logic states.

2. A binary random noise generator as claimed in claim 1, wherein said means for generating a binary signal with random transitions comprises a Zener diode supplied by a DC voltage source and means for regulating said voltage source such that said Zener diode functions at a point near a bend in the voltage-current characteristic thereof.

3. A device for the stochastic coding of analog information comprising:

a binary random noise generator as claimed in claim 1;

at least one shift register with series input and parallel outputs, said input being connected to the output of said exclusive OR gate; and

means for synchronizing said shift register by said clock signal.

4. A device for the stochastic coding of digital or analog information, comprising a plurality of binary random noise generators as claimed in claim 1, said generators being arranged in parallel and having a clock and a by-two divider common to all of said generators.