Abstract: An AC detection circuit, including a live wire input end and a neutral wire input end; a first diode and a second diode being both Zener diodes and with anodes connected to each other; a first resistor and a second resistor; a rectification module connected to the live wire input end and the neutral wire input end; a power supply for supplying power; a current mirror module with a current value at the first output end and a current value at the second output end having a fixed ratio; a unidirectional conduction module, configured to enable unidirectional conduction of the current from the current mirror module to the first diode; and a current comparison module, including an oscillator, a timer, a current comparator and a reference current source, and configured to compare the current value of the second output end of the current mirror module with a reference current value.

Abstract: An AC resistance detection circuit and system. The circuit includes: a working state control module, generating a working state control signal; a sampling module, outputting a sampling signal of a resistance between a neutral wire and a live wire in the detection state; a comparison module, receiving a reference signal and the sampling signal, and outputting a comparison result; a counting signal generation module, receiving an oscillation signal and the working state control signal, and outputting the oscillation signal as a counting signal in the detection state; a zero clearing module, receiving the comparison result and the working state control signal, and outputting an active zero clearing signal when resistance between the neutral wire and the live wire is greater than a threshold; and a counting module, connected to the counting signal and the zero clearing signal, and outputting a high level when a count value reaches a preset value.

Abstract: An AC resistance detection circuit and system. The circuit includes: a working state control module, generating a working state control signal; a sampling module, outputting a sampling signal of a resistance between a neutral wire and a live wire in the detection state; a comparison module, receiving a reference signal and the sampling signal, and outputting a comparison result; a counting signal generation module, receiving an oscillation signal and the working state control signal, and outputting the oscillation signal as a counting signal in the detection state; a zero clearing module, receiving the comparison result and the working state control signal, and outputting an active zero clearing signal when resistance between the neutral wire and the live wire is greater than a threshold; and a counting module, connected to the counting signal and the zero clearing signal, and outputting a high level when a count value reaches a preset value.

Abstract: An active rectifier bridge circuit and an on-chip integrated system. The active rectifier bridge circuit includes: a bias module, configured to provide a first bias current source, a second bias current source, and an internal power supply for a gate driver module; the gate driver module controlled by the first bias current source, the second bias current source, and the internal power supply, and configured to process one group of alternating current input voltages to generate two groups of control signals that are mutually inverted, to generate four gate drive signals; a power switch tube rectification module, connected to the bias module and the gate driver module, configured to: perform a turn-on or turn-off operation on corresponding power switch tubes under the control of the four gate drive signals, and convert the one group of alternating current input voltages into a direct current output voltage for output.

Abstract: An active rectifier bridge circuit and an on-chip integrated system. The active rectifier bridge circuit includes: a bias module, configured to provide a first bias current source, a second bias current source, and an internal power supply for a gate driver module; the gate driver module controlled by the first bias current source, the second bias current source, and the internal power supply, and configured to process one group of alternating current input voltages to generate two groups of control signals that are mutually inverted, to generate four gate drive signals; a power switch tube rectification module, connected to the bias module and the gate driver module, configured to: perform a turn-on or turn-off operation on corresponding power switch tubes under the control of the four gate drive signals, and convert the one group of alternating current input voltages into a direct current output voltage for output.