I have 3 input signals which are pulse waveforms The output is switch to high once once all 3 first rising edges of 3 inputs are detected. Is there a digital circuit from logic gates, flip flop that can do that? I am thinking about flip flop but the problem is that it detects with every rising edge not just the first rising edge.
Put each input on the set of an SR latch, and AND all the outputs together.
As defined 3 rising edges are asynchronous thus reset 3 latches and NOR input= output