Relative tolerance is a measure of the allowable variation of a parameter in a circuit simulation, expressed as a percentage of the nominal value. This concept is critical in SPICE-based circuit simulators because it helps to determine how much deviation from the expected output is acceptable during analysis, allowing engineers to account for real-world conditions like component tolerances and environmental factors. By specifying relative tolerance, engineers can optimize simulation accuracy and computational efficiency while ensuring that results are meaningful within acceptable limits.
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