Question

Depending upon the flow of current from the output of one logic circuit to the input of another the logic families can be divides into _________ categories.

(a) 2

(b) 3

(c) 4

(d) 5

I got this question in homework.

Question is from Digital Integrated Circuits topic in portion Boolean Algebra and Minimization Techniques and Logic Gates of Digital Circuits

Answer 1

Right answer is (a) 2

Easy explanation: Depending upon the flow of current from the output of one logic circuit to the input of another the logic families can be divides into two categories and they are current sourcing and current sinking. Source means from where the current originates or exits while Sink means where the current enters or is accepted.