Monostable Flip-Flop

R2026b

Raising edge, falling edge, either edge monostable flip-flop

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Monostable Flip-Flop block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
Simscape / Electrical / Control / General Control

Description

The Monostable Flip-Flop (or monostable multivibrator) block generates a single output pulse of a specified duration when it is triggered externally. The external trigger is a Boolean signal. Pulse generation is triggered when a change is detected in the external trigger signal. The change detection can be:

• Rising edge

• Falling edge

• Either edge

When the output is true, a change in the external trigger signal has no effect.

The operation of a monostable flip-flop is represented in the following figure:

Ports

Input

Trigger — Flip-flop trigger

0 | 1

Input trigger signal to the flip-flop.

Data Types: Boolean

Output

Q — Flip-flop output

0 | 1

Flip-flop output signal.

Data Types: Boolean

Parameters

Change detection — Change in trigger signal

Rising edge (default) | Falling edge | Either edge

Change detection strategy for output pulse generation.

Initial output — Flip-flop initial output

0 (default) | scalar

The initial output of the flip-flop.

Pulse duration (s) — Output pulse duration

0.01 (default) | positive scalar

Duration of the output pulse, in s.

Sample time — Block sample time

0.001 (default) | 0 | positive scalar

Time between consecutive block executions. During execution, the block produces outputs and, if appropriate, updates its internal state. For more information, see What Is Sample Time? and Specify Sample Time.

For discrete-time operation, set the sample time to a positive value. For continuous-time operation, set the sample time to 0.

If this block is in a masked subsystem, or other variant subsystem that allows either continuous and discrete operation, promote the sample time parameter. Promoting the sample time parameter ensures correct switching between the continuous and discrete implementations of the block. For more information, see Promote Block Parameters to a Mask.

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"ee_sl_lib/General Control/Monostable Flip-Flop"

Example: add_block("ee_sl_lib/General Control/Monostable Flip-Flop","myModel/myBlock",MakeNameUnique="on")

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2018b