Single-line oscilloscope display device circuit diagram

This display device circuit uses a single-line oscilloscope to display 4 continuous signals at the same time, so as to compare the time relationship of different signals. CC4017 is an oscillator and a counter, which forms a 4-beat circuit to control 4 pairs of analog shapes to connect them in sequence. Each pair of analog switches adds an adjustable DC level and 1 signal, which is mixed by an adder composed of an operational amplifier and 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.