Creating and Manipulating Models    

First-Order Hold

First-order hold (FOH) differs from ZOH by the underlying hold mechanism. To turn the input samples into a continuous input , FOH uses linear interpolation between samples.

This method is generally more accurate than ZOH for systems driven by smooth inputs. Due to causality constraints, this option is only available for c2d conversions, and not d2c conversions.


  Zero-Order Hold Tustin Approximation