Fig. 6
From: Development of a miniaturized stimulation device for electrical stimulation of cells

The frequency division of the CMOS 65nm technology simulated using Cadence®. a Input frequency of AC square waves (top) is divided by two (second row) then by four (third row), etc. All output waveforms are square waves. b If sine waves are desired, these output signals can be passed through a RC low-pass filter (not shown). Sine waveforms with the same frequency can then be obtained as shown.