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Laplace Transform

Source lecture(s): PHY621 Lec4

Physical Meaning

Converts time-domain functions to complex frequency \(s\)-plane representations.

Variable Definitions

Symbol Meaning
\(s\) complex frequency
\(f(t)\) time-domain function

Assumptions

\(f(t)=0\) for \(t<0\) (unilateral); region of convergence required.

Derivation

Direct from integral definition; table entries follow by integration-by-parts.

Applications

RC/RL/RLC circuits, control theory, initial-value problems.

Connections to Other Equations

  • fourier-integral
  • convolution