Before revision: Simple example To demonstrate how to determine if a system is time-invariant, consider the two systems: System A: System B: Since system A explicitly depends on t outside of and , it is not time-invariant .
After revision: Simple example To demonstrate how to determine if a system is time-invariant, consider the two systems: System A: System B: Since system A explicitly depends on t outside of the System Function for , it is not time-invariant .