in many sc ciruits, two-phase non-overlap clock is usually used. here, i have some questions:

1, make a 1M clock for example (Fclk=1M), what is the time interval of non-overlap (Tnon-overlap)? what is the percentage of Tnon-overlap in Tclk (1us)?
or what is the minimum value of Tnon-overlap? how to decide the time interval of non-overlap (Tnon-overlap) for a given Tclk?

2, to realize bottom plate sampling, phi1 is usually used (phi1d and phi2d are two-phase non-overlap clock), phi1 and phi1d have almost the same rising edge, but phi1 has a earlier falling edge than phi1d (interval = Tearly). here, what is the value of Tearly? what is the percentage of Tearly in Tclk (1us)? how to decide the value of Tearly for a given Tclk?

i need some explanations, oe some related papers.
thanks all for your reply. thanks.