I'm trying to implement an analog debouncing filter which uses a 555 timer and a D-flop. Here is the recommended circuit.
But when I simulate this in LTspice as below, the output is 1V constant:
Above red V2 represents the 555 timer clock, green V1 represents the noisy input signal; and blue Vout represents the output.
Why is the debounced output not the same as in the page I follow? How can I correct it?