olemus
taktgeneraatori võnkeperiood, vähim protsessori ajaüksus
= the time interval between rising edges of a repetitive clock signal
http://138.47.18.129/book/circuits/images/rsflipflopholdone.png

ülevaateid
https://cs.stackexchange.com/questions/149651/what-is-the-difference-between-clock-cycle-and-clock-period
https://www.techopedia.com/definition/5498/clock-cycle
https://en.wikipedia.org/wiki/Cycles_per_instruction
http://138.47.18.129/book/circuits/circuitsSequential2.html