. " delay time achieved by the delay elements is about 2 ns;FIG. 4 is a third timing chart explanatory of how the position sensor unit shown in FIG. 1 operates when the delay time achieved by the delay elements is about 4 ns;FIG. 5 is a block diagram showing in detail an example structure of a divisor/dividend detecting circuit shown in FIG. 1;FIG. 6 is a timing chart explanatory of how the divisor/d" . . .