Voltage fluctuation detection circuit

A voltage fluctuation detection circuit, comprising:

• a rising edge trigger circuit, including an input terminal and an output terminal, wherein the rising edge trigger circuit detects an operating voltage received by the input terminal with a preset clock period, and when a change of the operating voltage within the preset clock period is greater than a preset bias voltage, an output signal of the output terminal undergoes at least one target flip between a high level and a low level;
• and
• a detection and output circuit, connected to the output terminal of the rising edge trigger circuit, and configured to detect the change of the operating voltage and the target flip, and output a control signal according to a detection result, wherein
• when the detection result of the detection and output circuit indicates that
• an output signal of the rising edge trigger circuit always undergoes the target flip in N consecutive preset clock periods, and
• the operating voltage is always not less than a starting threshold value for each target flip of all the target flips occurring in the N consecutive preset clock periods,
• the detection and output circuit generates a first signal as the control signal, where N is a natural number not less than 2.