Hi everyone I want to build an analog circuit that consists of 4 parts. Part1 is a simple adjustable square wave Part2 changes the duty cycle of the wave generated from Part1. Part3 shifts the phase of the wave generated from Part1. Part4 changes the duty cycle of the wave generated from Part3. I need two signals from this circuit: Signal1 from Part2 Signal1 from Part4 it is clear that I need four potentiometers for adjusting in all the parts. Can anyone suggest a simple circuit for the blocks?