Simulink Reference

Saturation

Limit the range of a signal

Library

Simulink Discontinuities and Fixed-Point Blockset Nonlinear

Description

The Saturation block imposes upper and lower bounds on a signal. When the input signal is within the range specified by the Lower limit and Upper limit parameters, the input signal passes through unchanged. When the input signal is outside these bounds, the signal is clipped to the upper or lower bound.

When the Lower limit and Upper limit parameters are set to the same value, the block outputs that value.

Data Type Support

A Saturation block accepts and outputs real signals of any data type, including fixed-point data types, except int64 and uint64. The output data type is the same as the input data type.

Parameters and Dialog Box

Upper limit

Specify the upper bound on the input signal. When the input signal to the Saturation block is above this value, the output of the block is clipped to this value.

Lower limit

Specify the lower bound on the input signal. When the input signal to the Saturation block is below this value, the output of the block is clipped to this value.

Treat as gain when linearizing

Linearization commands in Simulink treat this block as a gain in state space. Select this parameter to cause the linearization commands to treat the gain as 1; otherwise, the commands treat the gain as 0.

Enable zero crossing detection

Select to enable zero crossing detection. For more information, see Zero Crossing Detection in the Using Simulink documentation.

Conversions and Operations

Both the Upper limit and Lower limit parameters are converted to the input data type offline using round-to-nearest and saturation.

Characteristics

Dimensionalized	Yes
Direct Feedthrough	Yes
Sample Time	Inherited from driving block
Scalar Expansion	Of parameters and input
Zero Crossing	No, unless Enable zero crossing detection is selected

Rounding Function

Scope, Floating Scope