Unit Delay With Preview Enabled (Fixed-Point Blockset)

Fixed-Point Blockset

Unit Delay With Preview Enabled

Output the signal and the signal delayed by one sample period, if the external enable signal is on

Library

Delays & Holds

Description

The Unit Delay With Preview Enabled block supports calculations that have feedback and depend on the current input.

The block has two output ports. When the external enable signal E is on, the upper port outputs the signal and the lower port outputs the signal delayed by one sample period. The block has two input ports, one for the input signal u and the other for the enable signal E.

When the enable signal E is off, the block is disabled, and the state and output values do not change, except for resets. The enable signal is on when E is not 0, and off when E is 0.

The input u and initial condition IC must be the same data type, but can be any data type. The output is the same data type as the inputs u and IC. The reset R can be any data type.

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

Parameters and Dialog Box

Initial condition: Initial condition.
Sample time: Sample time.

Characteristics

Input Port u
Any data type supported by the blockset

Input Port E
Any data type supported by the blockset

Output Ports
Same as the input u

Direct Feedthrough
Yes, to upper output port
No, to lower output port

Scalar Expansion
Yes

Input Port `u`	Any data type supported by the blockset
Input Port `E`	Any data type supported by the blockset
Output Ports	Same as the input `u`
Direct Feedthrough	Yes, to upper output port No, to lower output port
Scalar Expansion	Yes

Unit Delay Resettable External IC Unit Delay With Preview Enabled Resettable