First-Order Hold (Simulink Reference)

Implement a first-order sample-and-hold

Library

Discrete

Description

The First-Order Hold block implements a first-order sample-and-hold that operates at the specified sampling interval. This block has little value in practical applications and is included primarily for academic purposes.

You can see the difference between the Zero-Order Hold and First-Order Hold blocks by running the demo program fohdemo. This figure compares the output from a Sine Wave block and a First-Order Hold block.

Data Type Support

The First-Order Hold block accepts and outputs signals of type double.

Parameters and Dialog Box

Sample time: The time interval between samples. See Specifying Sample Time in the online documentation for more information.

Characteristics

Direct Feedthrough
No

Sample Time
Specified in the Sample time parameter

Scalar Expansion
No

States
1 continuous and 1 discrete per input element

Dimensionalized
Yes

Zero Crossing
No

Direct Feedthrough	No
Sample Time	Specified in the Sample time parameter
Scalar Expansion	No
States	1 continuous and 1 discrete per input element
Dimensionalized	Yes
Zero Crossing	No

Fcn Fixed-Point State-Space