Logic Gates, Boolean Algebra, and Logic Circuits
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Questions and Answers

What is the main difference between a digital signal and an analog signal?

  • A digital signal is always a sine wave while an analog signal can be any waveform
  • A digital signal has amplitude, frequency, and phase while an analog signal does not
  • A digital signal is periodic while an analog signal is non-periodic
  • A digital signal is discrete while an analog signal is continuous (correct)

Which of the following is a characteristic of a periodic analog signal?

  • Pulse amplitude, frequency, and duty cycle
  • Amplitude, frequency, and phase (correct)
  • Number of cycles per second represented in Hertz
  • Discrete voltage levels changing back and forth

What does the duty cycle of a periodic digital signal represent?

  • The value of the signal at any given time
  • Period of high-level divided by the total period (correct)
  • The time period of the signal
  • The number of cycles per second represented in Hertz

In the time domain, how can the amplitude of a sine wave be mathematically represented?

<p>$a(t) = A \sin( \omega t)$ where A is the maximum amplitude and $\omega$ is the angular frequency (A)</p> Signup and view all the answers

What is the equation for angular frequency (ω) given a frequency (f) of 100 Hz?

<p>$\omega = 2\pi f$ (B)</p> Signup and view all the answers

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