MAGNETIC SENSOR AND AN INTEGRATED CIRCUIT

摘要

The present teaching relates to a magnetic sensor comprising an input port, a magnetic field detecting circuit that generates a magnet detection signal, an output control circuit that controls operation of the magnetic sensor, and an output port. The magnetic field detecting circuit includes a magnetic sensing element that detects 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, and an analog-digital conversion element configured to convert the processed detection signal into a magnet detection signal, and the output control circuit controls 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 the signal processing element comprises a folded cascode amplifier.

主权项

1. 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, anda 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, whereinin the first state, a load current flows from the output port to outside of the magnetic sensor, andin the second state, a load current flows from the outside into the output port of the magnetic sensor,wherein the signal processing element comprises a folded cascode amplifier.