| CPC G01R 23/10 (2013.01) | 20 Claims |
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1. An oscillation detector for detecting oscillation of a voltage, the oscillation detector comprising:
an amplitude variation detection circuit configured to generate a first pulse signal by comparing a level of a first voltage with a level of a second voltage;
a frequency variation detection circuit configured to generate a second pulse signal by filtering the first pulse signal and allowing a frequency component that is less than or equal to a reference frequency from among frequency components of the first pulse signal; and
a time variation detection circuit configured to output an oscillation detection signal based on the second pulse signal having consecutive pulses for a first time period.
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