Unijunction transistors (UJTs) were common circuit elements several decades ago. A simple ramp generator could be built from a single UJT and a few other components (Fig. 1). 1. In a simple UJT ...

The digital ramp generator circuit in the figure, however, can vary the ramp frequency from less than 1 Hz to about 30 kHz just by varying the input clock from 100 Hz to about 6 MHz. The ...

The output of many dc/dc converters can be made to track an applied ramp or other voltage waveform, and the application notes for modern point-of-load power supplies often describe circuits that track ...