Question

When the outputs of two inverters are wired together the result is __________

(a) A two-input NOR gate

(b) A single-input NOR gate

(c) A two-input NAND gate

(d) A single-input NAND gate

The question was asked by my college professor while I was bunking the class.

I would like to ask this question from Integrated-injection Logic(I^2L) topic in chapter Logic Families of Digital Circuits

Answer 1

Correct answer is (a) A two-input NOR gate

Easy explanation: When the outputs of two inverters are wired together then the result is a two-input NOR gate because the configuration (NOT A) AND (NOT B) is equivalent to NOT (A OR B). In a NOR gate, the output is high only when all of its input are at logic 0 else, the output is low.