Can anyone steer me in the right direction on why I am having problems delaying a pulse using r/c configuration between two 74ls14 schmidt trigger elements? Typical pulse width is ~1 us and I need a ~250ns delay. I have tried using 100pf cap and 2.2K resistor but can see only small offset from input signal. Stepping resistor to 4.7k produces no output at all so I assume I am dropping voltage too much to trigger second stage. Also tried varying the cap but see no noticeable improvement either. Should I just drop the schmidts and replace IC's with standard hex inverters to get the desired results? Any help would be appreciated.
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