CURRENT SENSING CIRCUIT AND METHOD THEREOF

摘要

A current sensing circuit comprises a high frequency signal generator, an electromagnetic exchanger, and a demodulation circuit. The high frequency signal generator generates a high frequency signal. The electromagnetic exchanger couples to the high frequency signal generator, and receives the high frequency signal to generate a high frequency magnetic field. The high frequency magnetic field modulates the magnetic field induced by a current to generate a modulated magnetic field. The electromagnetic exchanger induces the modulated magnetic field to output a modulated signal. The demodulation circuit couples to the electromagnetic exchanger, and performs demodulation to output a sensing result according to the modulated signal.

主权项

1. A current sensing circuit, comprising:
a high frequency signal generator, for generating a high frequency signal; an electromagnetic exchanger, coupled to the high frequency signal generator, receives the high frequency signal to generate a high frequency magnetic field, wherein the high frequency magnetic field modulates a magnetic field induced by a current to generate a modulated magnetic field, and the electromagnetic exchanger induces the modulated magnetic field to output a modulated signal; and a demodulation circuit, coupled to the electromagnetic exchanger, performs demodulation to output a sensing result according to the modulated signal.