Generating analog sawtooth waveforms (linear ramp followed by ... this resets “Saw Out” to ground as shown in Figure 3. Figure 3 “Square In” and “Saw Out” voltage waveforms where Vsaw = V L T/(R1C1).

The frequency of the sawtooth is digitally programmable, so the design requires no external components to set the frequency. A DDS device, a programmable waveform generator, can deliver sine, square, ...