Signal generation circuit, frequency measurement device including the signal generation circuit, and signal generation method

A signal generation method comprising:

• a step of, based on a first signal having a specified frequency, generating a first frequency-divided signal obtained by frequency-dividing the first signal by a first frequency dividing ratio and a second frequency-divided signal obtained by frequency-dividing the first signal by a second frequency dividing ratio;
• and
• a process of repeating:
• a step 1) of adding a first constant indicating a ratio of the first frequency-divided signal included in a variable rate frequency-divided signal to be generated to a first variable;
• a step 2-1) of, when the first variable after the addition becomes greater than or equal to a result of addition of the first constant and a second constant indicating a ratio of the second frequency-divided signal included in the variable rate frequency-divided signal, outputting the first frequency-divided signal, subtracting the first constant and the second constant from the first variable, and returning to the step 1);
• and
• a step 2-2) of, when the first variable after the addition becomes smaller than a result of addition of the first constant and the second constant, outputting the second frequency-divided signal and returning to the process 1),
• thereby generating the variable rate frequency-divided signal in which the first frequency-divided signal and the second frequency-divided signal temporally alternately appear in a specified mixing ratio.