Figure 3
From: Atmospheric pressure air microplasma current time series for true random bit generation
Analysis of bitstream obtained from the atmospheric pressure air microplasma (APAMP) current signal: (a) Bit values of a typical sequence of 64 successive bits in a 1D stair plot. (b) 2D raster image of randomly selected \(200\times 200\) consecutive bits which does not show, at least visually, any particular concentration of pockets or patterns of zeros or ones, (c) Autocorrelation plot of a sample of binary data collected at 100 MS/s (correlation is positive and anti-correlation is negative), (d) Histograms of 24576000-long bitstreams generated from current time series collected at 10, 50 and 100 MS/s, (e) FFT of data collected directly from the 14-bit ADC register of the DAQ board (current and noise) at 100 MS/s.
