Introduction Ideally, the system parameters along with the signal variables have infinite precision taking any value between -oo and oo In practice, they can take only discrete values within a specified range since the registers of the digital machine where they are stored are of finite lengt s. The discretization process results in nonlinear difference equations characterizing the discrete-time systemsIntroduction • Ideally, the system parameters along with the signal variables have infinite precision taking any value between - and  • In practice, they can take only discrete values within a specified range since the registers of the digital machine where they are stored are of finite length • The discretization process results in nonlinear difference equations characterizing the discrete-time systems