Ripple characteristic correction circuit and ripple characteristics correction method

摘要

PROBLEM TO BE SOLVED: To reduce influences of ripple less in a circuit.;SOLUTION: In a ripple characteristic correction circuit 10 for measuring ripple in a circuit including a first circuit 12 and a second circuit 14, a control circuit 18 inputs, to the first circuit 12, a plurality of ripple measuring signals of frequencies with respectively different frequency differences from a reference frequency, and a frequency converting unit 16 converts the frequencies of the ripple measuring signals so that a tipple measuring signal outputted from the first circuit 12 becomes the reference frequency, and inputs, to the second circuit 14, the ripple measuring signals to convert frequencies thereof in the frequency converting unit 16. The control circuit 18 then measures an amplitude of a ripple measuring signal outputted from the second circuit 14 and calculates the ripple of the first circuit 12 based on the measured amplitude for each frequency difference.;COPYRIGHT: (C)2006,JPO&NCIPI