Patent ID: 11926271
Assignee: ZTE CORPORATION
Field: Measurement (Instruments)
Classification: CPC B  G  Y | IPC B  G

Claim 0:
1. A detection circuit for instantaneous voltage drop, comprising: two RC circuits, a comparator and a determination unit;
each RC circuit comprises a first resistor, a second resistor and an energy storage capacitor; a first end of the first resistor is used for receiving a to-be-detected voltage, a second end of the first resistor is connected to a first end of the second resistor, and a second end of the second resistor is grounded; the energy storage capacitor is connected in parallel with the second resistor; the first end of the second resistor forms an output end of the RC circuit;
output ends of the two RC circuits are correspondingly connected to two input ends of the comparator respectively; an output end of the comparator is connected to the determination unit;
wherein in the two RC circuits, resistance ratios of the second resistors to the first resistors are different, capacitances of the energy storage capacitors are different, and the capacitance of the energy storage capacitor in the RC circuit with a larger resistance ratio of the second resistor to the first resistor is smaller; and the determination unit is configured to determine that the to-be-detected voltage drops instantaneously when it is at least detected that the comparator is inverted.