CSC258H1 Lecture Notes - Lecture 4: Canonical Normal Form, Threadx
Document Summary
When a point in circuit is at 5v potential, we call that high value or 1. The point is at 5v potential, if there is a direct path (no resistance) from vcc to this point in the circuit. When a point in circuit is at 0v potential, we call that low value or 0. The point is at 0v potential, if there is a direct path (no resistance) from gnd to this point in the circuit. A point in the circuit which does not have a path to either vcc or gnd is at an undefined potential. Consider the following example: (cid:862)gi(cid:448)e(cid:374) three i(cid:374)puts a, b, a(cid:374)d c, (cid:373)ake output y high (cid:449)he(cid:374)e(cid:448)er a(cid:374)(cid:455) of the i(cid:374)puts are lo(cid:449), e(cid:454)(cid:272)ept (cid:449)he(cid:374) all three are lo(cid:449) or (cid:449)he(cid:374) a a(cid:374)d c are high. (cid:863) There should (cid:271)e a (cid:271)etter (cid:449)a(cid:455) to des(cid:272)ri(cid:271)e the (cid:272)ases (cid:449)he(cid:374) the (cid:272)ir(cid:272)uit"s output is high. 0 m0 m1 m2 m3 m4 m5 m6 m7.
