Transfer Fcn Real Zero - Implement discrete-time transfer function that has real zero and no pole

Library

Discrete

Description

The Transfer Fcn Real Zero block implements a discrete-time transfer function that has a real zero and effectively no pole.

Data Type Support

The Transfer Fcn Real Zero block accepts signals of any numeric data type that Simulink supports, including fixed-point data types.

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

Parameters and Dialog Box

Zero (in Z plane)

Set the zero.

Initial condition for previous input

Set the initial condition for the previous input.

Input processing

Specify whether the block performs sample- or frame-based processing. You can select one of the following options:

• Elements as channels (sample based) — Treat each element of the input as a separate channel (sample-based processing).

• Columns as channels (frame based) — Treat each column of the input as a separate channel (frame-based processing).

  Note   Frame-based processing requires a DSP System Toolbox license. For more information, see Sample- and Frame-Based Concepts in the DSP System Toolbox documentation.

• Inherited — Inherit the processing mode from the input signal and delay the input accordingly. You can identify whether the input signal is sample or frame based by looking at the signal line. Simulink represents sample-based signals with a single line and frame-based signals with a double line.

  Note   When you choose the Inherited option for the Input processing parameter, and the input signal is frame-based, Simulink® will generate a warning or error in future releases.

Use Input processing to specify whether the block performs sample- or frame-based processing. The block accepts frame-based signals for the input u. All other input signals must be sample based.

Input Signal u	Input Processing Mode	Block Works?
Sample based	Sample based	Yes
Frame based		No, produces an error
Sample based	Frame based	Yes
Frame based		Yes
Sample based	Inherited	Yes
Frame based		Yes

For more information about these two processing modes, see Sample- and Frame-Based Concepts in the DSP System Toolbox documentation.

Integer rounding mode

Specify the rounding mode for fixed-point operations. For more information, see Rounding in the Simulink Fixed Point User's Guide.

Saturate to max or min when overflows occur

Select to have overflows saturate to the maximum or minimum value that the data type can represent. Otherwise, overflows wrap.

When you select this check box, saturation applies to every internal operation on the block, not just the output or result. In general, the code generation process can detect when overflow is not possible. In this case, the code generator does not produce saturation code.

Characteristics

Direct Feedthrough	Yes
Scalar Expansion	Yes, of initial conditions
Zero-Crossing Detection	No

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