Magnetic sensor integrated circuit, motor assembly and application apparatus

A magnetic sensor integrated circuit, comprising:

• a rectifier circuit converting an external power into a DC power;
• a magnetic field detection circuit sensing a polarity of an external magnetic field and outputting a magnetic detection signal;
• wherein the magnetic field detection circuit comprises a magnetic sensor, a first chopping switch, a first amplifier unit and a switched capacitor filter module;
• a timing controller outputting a first clock signal to the first chopping switch and the first amplifier unit, and a second clock signal to the switched capacitor filter module;
• wherein a frequency of the first clock signal is same with a frequency of the second clock signal, and the second clock signal is delayed for the first clock signal with a first predetermined time;
• and
• wherein the magnetic sensor comprises a first terminal, a second terminal, a third terminal opposite to the first terminal, and a fourth terminal opposite to the second terminal;
• a first discharging branch coupled between the first terminal and the third terminal;
• a second discharging branch coupled between the second terminal and the fourth terminal;
• wherein before the first terminal and the third terminal serve as power input terminals, the second terminal and the fourth terminal serve as magnetic field detection signal output terminals, the second discharging branch is turned on;
• before the first terminal and the third terminal serve as the magnetic field detection signal output terminals, the second terminal and the fourth terminal serve as power input terminals, the first discharging branch is turned on.