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First-Order Hold

Implement 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.

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. For more information, see Data Types Supported by Simulink in the Simulink® documentation.

Parameters and Dialog Box

Sample time

The time interval between samples. See Specify 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

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