Question

According to Sampling theorem

(a) Ts is greater than 1/2fm

(b) Ts is lesser than 1/2fm

(c) Ts is equal to 1/2fm

(d) Ts is lesser than or equal to 1/2fm

The question was posed to me during an interview for a job.

My question is from Formatting Analog Information topic in section Formatting and Baseband Modulation of Digital Communications

Answer 1

The correct option is (d) Ts is lesser than or equal to 1/2fm

Easiest explanation: By sampling theorem the input can be derived from the output samples if Ts is lesser than or equal to 1/2fm.