Single-line oscilloscope display device circuit diagram

This display device circuit can display four continuous signals at the same time using a single-line oscilloscope to facilitate comparison of the time relationships of different signals.

CC4017 is an oscillator and counter, forming a 4-beat circuit to control 4 pairs of analog shapes to turn them on in sequence. Each pair of analog switches adds an adjustable DC level and a signal, which are mixed by an adder composed of operational amplifiers and then sent to the Y-axis of the oscilloscope. Since each signal corresponds to a different DC level, the oscilloscope can separate the 4 signals up and down.