A specialized logic input circuit that switches its output at two different voltage thresholds depending on whether the input is rising or falling. This built-in hysteresis prevents the output from oscillating when a slow-moving or noisy input signal hovers around the transition point. It is universally used to debounce switches, square up sloppy waveforms, and interface analog sensors to digital logic.
Heard on the job
That clock signal is too rounded, run it through a Schmitt trigger to sharpen the edges before it hits the flip-flop.