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           Second Order Backward Difference Formula

Second Order Backward Difference Formula

The Second Order Backward Difference Formula or BDF2 is also called the Gear method.

BDF2 is not quite as accurate as the trapezoidal rule, but is an A-stable numerical method. This means that BDF2 does not produce ringing, but instead produces numerical damping (the calculated circuit output eventually decays to zero although the true behavior does not). If BDF2 exhibits severe damping, use TRAP or NDF2.

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