Question

Logic circuits that are designated as buffers, drivers or buffers/drivers are designed to have _______________

(a) A greater current/voltage capability than an ordinary logic circuit

(b) Greater input current/voltage capability than an ordinary logic circuit

(c) A smaller output current/voltage capability than an ordinary logic

(d) Greater the input and output current/voltage capability than an ordinary logic circuit

I have been asked this question in an interview for job.

Query is from Digital Integrated Circuits in section Boolean Algebra and Minimization Techniques and Logic Gates of Digital Circuits

Answer 1

Correct answer is (a) A greater current/voltage capability than an ordinary logic circuit

To elaborate: Buffer circuits are usually incorporated to isolate the input from the output. Logic circuits that are designated as buffers, drivers or buffer/drivers are designed to have a greater current/voltage capability than an ordinary logic circuit.