BrainTok
ENESIT

Signals and Systems: Signal classification and operations · Types of Signals and Time Operations

How engineers sort signals (continuous or discrete, periodic, even or odd, energy or power) and reshape them by shifting, scaling and reversing time.

Signals and Systems · 26 questions

Try 3 questions

1. What defines a continuous-time signal?

  1. It has a value at every instant in an interval
  2. It has a value only when something changes
  3. It has values only at evenly spaced instants
Show the answer

Answer: It has a value at every instant in an interval

A continuous-time signal x(t) is defined for every real t in its domain, unlike a discrete-time signal x[n], which exists only at integer indices.

2. A sensor voltage is sampled every millisecond but not yet rounded to fixed levels. What kind of signal is this?

  1. Continuous-time with discrete amplitude
  2. Discrete-time with continuous amplitude
  3. Fully digital in both time and amplitude
Show the answer

Answer: Discrete-time with continuous amplitude

Sampling makes time discrete, but the amplitude stays continuous until it is quantized to a finite set of levels.

3. What makes a signal digital rather than merely discrete-time?

  1. Its amplitude takes only a finite set of values
  2. It is stored inside a computer chip
  3. It is sampled at a very high rate
Show the answer

Answer: Its amplitude takes only a finite set of values

A digital signal is discrete in both time and amplitude; quantization restricts each sample to one of a finite number of levels.

The rest of the quiz, a few questions at a time

BrainTok asks a few questions from quizzes like these before the apps you choose open, so your screen time turns into learning. For iPhone.

Join the beta

More Electrical and Electronic Engineering quizzes