Specifications

13 SISO Design Tool Reference
13-16
Conversion method. The following are the available continuous-to-discrete
conversion methods:
•Zero-order hold
•First-order hold
•Tustin
•Tustin with prewarping
•Matched pole/zero
If you choose Tustin with prewarping, you must specify the critical frequency
in rad/sec.
Discrete-time domain. If you currently have a discrete-time system, the
Continuous/Discrete Conversion window looks like this figure.
You can either change the sample time of the discrete system (resampling) or
do a discrete-to-continuous conversion.
To resample your system, select
Discrete time with new sample time and
specify the new sample time in the
Sample time (sec) field. The sample time
must be a positive number.
To convert from discrete-time to continuous-time, you have the following
options for the conversion method:
•Zero-order hold
•Tustin