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Calcrivo

Inverse Z-Transform Calculator

Find the discrete sequence from a standard-form Z-transform expression.

Inputs

x[n] value

0.03125000

x[n] =

x[n] = 0.5^n = 0.03125

Step by step

  1. Values used

    X(z) form = z/(z-a) → aⁿu[n]; a (base) = 0.5000; Evaluate x[n] at n = = 5

  2. Inverse Z-transform

    x[n] = Z⁻¹{X(z)}

  3. x[n] value

    = 0.03125000

  4. x[n] =

    = x[n] = 0.5^n = 0.03125

How it works

Finds the inverse Z-transform x[n] = Z⁻¹{X(z)} for standard forms. Supported: • Z⁻¹{z/(z-a)} = aⁿ·u[n] • Z⁻¹{az/(z-a)²} = n·aⁿ·u[n] • Z⁻¹{1} = δ[n] • Z⁻¹{z/(z-1)} = u[n] • Z⁻¹{z/(z-1)²} = n·u[n]

Formula

Inverse Z-transform

x[n] = Z⁻¹{X(z)}

x[n]
Discrete sequence
X(z)
Z-domain transform

Frequently Asked Questions

How do I invert a complex X(z)?

Use partial fraction decomposition to break X(z)/z into simpler terms, then use the standard inverse transform pairs for each term.

What does u[n] mean?

u[n] is the unit step sequence: u[n] = 1 for n ≥ 0, and 0 for n < 0. It indicates the sequence is causal (right-sided).

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