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-based ...

Figure 2: This specialized IC generates three independent ramps for use in supply-voltage tracking and sequencing. Two or more supply voltages can be made to track by connecting their TRACK pins to ...

It’s not always easy to design a ramp generator whose ramping frequency can be changed without manipulation of capacitors or inductors. Many ramp circuit designs are available, but they may not be ...