This circuit was found in old publication about oscilloscopes. As an example of a complex waveform, let us study the staircase wave, useful for frequency division and for tracing a family of-characteristics. As shown here, such a waveform may be obtained by adding two sawtooth waves of suitable frequency and amplitude. Such a staircase wave pattern, produced for demonstration purposes only. It was obtained using two gas triode sweep oscillators with a frequency ratio of 5 to I (there are five steps). the whole affair being properly synchronized. These voltages are added in the GR tube, for the sawtooth waves are directly injected into the Y1 and Y2 deflection plates. This overcomes a minor difficulty. Instead of adding two waves of opposite polarity the G-R tube actually substracts waves of the same polarity. If the gas triodes are used for frequency division, this pattern gives a good visual check of the dividing ratio.
