$10^{21}$

$10^{17}$

$10^{12}$

$10^8$

$16: 1$

$1: 16$

$1: 4$

$4: 1$

$$ \begin{array}{|c|c|c|} \hline A & B & y \\ \hline 0 & 0 & 1 \\ 0 & 1 & 0 \\ 1 & 0 & 0 \\ 1 & 1 & 1 \\ \hline \end{array} $$

$$ \begin{array}{|c|c|c|} \hline A & B & y \\ \hline 0 & 0 & 1 \\ 0 & 1 & 1 \\ 1 & 0 & 1 \\ 1 & 1 & 0 \\ \hline \end{array} $$

$$ \begin{array}{|c|c|c|} \hline A & B & y \\ \hline 0 & 0 & 0 \\ 0 & 1 & 0 \\ 1 & 0 & 0 \\ 1 & 1 & 1 \\ \hline \end{array} $$

$$ \begin{array}{|c|c|c|} \hline A & B & y \\ \hline 0 & 0 & 0 \\ 0 & 1 & 1 \\ 1 & 0 & 1 \\ 1 & 1 & 0 \\ \hline \end{array} $$

$3-30 \mathrm{kHz}$

$3-30 \mathrm{MHz}$

$3-30 \mathrm{~Hz}$

$3-30 \mathrm{GHz}$