Question

Controlled inverter is also known as ____________

(a) Controlled buffer

(b) NOT gate

(c) Both controlled buffer and NOT gate

(d) Controlled gate

I have been asked this question by my college director while I was bunking the class.

Asked question is from 4-Bit Parallel Adder/Subtractor topic in chapter Arithmetic Circuits of Digital Circuits

Answer 1

Correct option is (c) Both controlled buffer and NOT gate

The explanation is: Controlled inverter is also known as controlled buffer and NOT gate as well. It is used between output and a bus so that one can control whether the output is fed to the bus or not.