83.1 Discrete-Time Fourier Transform The DTFTs of some sequences exhibit discontinuities of 2t in their phase responses An alternate type of phase function that is a continuous function of o is often used It is derived from the original phase function by removing the discontinuities of2π§3.1 Discrete-Time Fourier Transform • The DTFTs of some sequences exhibit discontinuities of 2 in their phase responses • An alternate type of phase function that is a continuous function of  is often used • It is derived from the original phase function by removing the discontinuities of 2