Simulink®

Zero-Order Hold - Implement zero-order hold of one sample period

Library

Discrete

Description

The Zero-Order Hold block samples and holds its input for the specified sample period. The block accepts one input and generates one output, both of which can be scalar or vector. If the input is a vector, all elements of the vector are held for the same sample period.

You specify the time between samples with the Sample time parameter. A setting of -1 means the Sample time is inherited.

This block provides a mechanism for discretizing one or more signals in time.

Note   Do not use the Zero-Order Hold block to create a fast-to-slow transition between blocks operating at different sample rates. Instead, use the Rate Transition block.

Data Type Support

The Zero-Order Hold block accepts real or complex signals of any data type supported by Simulink^® software, including fixed-point data types.

For a discussion on the data types supported by Simulink software, see Data Types Supported by Simulink^® in the Simulink documentation.

Parameters and Dialog Box

Sample time (-1 for inherited)

Specify the time interval between samples. To inherit the sample time, set this parameter to -1. See Specifying Sample Time in the online documentation for more information.

Bus Support

The Zero-Order Hold block is a bus-capable block. The input can be a virtual or nonvirtual bus signal. No block-specific restrictions exist.

Characteristics

XY Graph

Zero-Pole