Discrete

R2026b

Blocks for modeling discrete-time systems that update at fixed sample rates, such as Delay, Discrete-Time Integrator, and Discrete Filter

Use blocks from the Discrete library to model systems that update at fixed sample rates rather than continuously. You can implement unit delays, discrete-time integrators, digital filters, and state-space models that execute at specified sample intervals. For systems that change smoothly over time, see the Continuous library.

To add blocks from this library to your model, see Add Blocks to Models.

Blocks

	Conditional Hold	Conditionally hold last value (Since R2026b)
	Delay	Delay input signal by fixed or variable sample periods
	Difference	Calculate change in signal over one time step
	Discrete Derivative	Compute discrete-time derivative
	Discrete FIR Filter	Model FIR filters
	Discrete Filter	Model Infinite Impulse Response (IIR) filters
	Discrete PID Controller	Discrete-time or continuous-time PID controller
	Discrete PID Controller (2DOF)	Discrete-time or continuous-time two-degree-of-freedom PID controller
	Discrete State-Space	Implement discrete state-space system
	Discrete Transfer Fcn	Implement discrete transfer function
	Discrete Zero-Pole	Model system defined by zeros and poles of discrete transfer function
	Discrete-Time Integrator	Perform discrete-time integration or accumulation of signal
	Memory	Output input from previous time step
	Propagation Delay	Model loop delay, latency, pulse delay (Since R2022b)
	Resettable Delay	Delay input signal by variable sample period and reset with external signal
	Tapped Delay	Delay scalar signal multiple sample periods and output all delayed versions
	Transfer Fcn First Order	Implement discrete-time first order transfer function
	Transfer Fcn Lead or Lag	Implement discrete-time lead or lag compensator
	Transfer Fcn Real Zero	Implement discrete-time transfer function that has real zero and no pole
	Unit Delay	Delay signal one sample period
	Variable Integer Delay	Delay input signal by variable sample period
	Zero-Order Hold	Implement zero-order hold sample period