Magnetic sensor and an integrated circuit

A magnetic sensor, comprising:

• an input port to be connected to an external power supply;
• a magnetic field detecting circuit configured to generate a magnet detection signal;
• an output control circuit configured to control operation of the magnetic sensor in response to the magnet detection signal;
• and
• an output port,
• wherein the magnetic field detecting circuit includes:
• a magnetic sensing element configured to detect an external magnetic field and output a detection signal,
• a signal processing element configured to amplify the detection signal and removing interference from the detection signal to generate processed detection signal, and
• a conversion element configured to convert the processed detection signal into the magnet detection signal, which is used to control the magnetic sensor to operate in at least one of a first state and a second state responsive to at least the magnet detection signal, wherein
• in the first state, a load current flows from the output port to outside of the magnetic sensor, and
• in the second state, a load current flows from the outside into the output port of the magnetic sensor.