First-Order Hold (Using Simulink)

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

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

Parameters and Dialog Box

Sample time: The time interval between samples.

Characteristics

Direct Feedthrough
No

Sample Time
Continuous

Scalar Expansion
No

States
1 continuous and 1 discrete per input element

Dimensionalized
Yes

Zero Crossing
No

Direct Feedthrough	No
Sample Time	Continuous
Scalar Expansion	No
States	1 continuous and 1 discrete per input element
Dimensionalized	Yes
Zero Crossing	No

Fcn From