How to Generate a Tri-level signal.

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lindula

Joined Sep 23, 2016
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Wolframore

Joined Jan 21, 2019
1,257
I believe that’s the video sync signal and the clock is about 74 MHz. Have you looked into tri-state buffers?
 

MisterBill2

Joined Jan 23, 2018
3,872
I see four distinct voltages, since zero is certainly a voltage. A 2 STAGE binary counter driving a 4:1 multiplexer IC such as a CD4053, with each input set to a specific voltage level. you will need to provide the driving frequency. Or use a 4017 decade counter and a 4051 quad gate and a bit of or gating to get the one wider dwell time.
BUT this is all guessing since we don't have a clue about either the current desired or the time at each voltage level.
 
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