| 摘要 |
PURPOSE: A variable inductance circuit device and a magnetic field wireless communication system using the variable inductance circuit device are provided to notice the urgent situation and detect the surrounding situation by using a complex sensor in a vehicle accident, thereby enhancing the operation efficiency of a vehicle system. CONSTITUTION: A sensing resistor senses the current flowing in an inductor for implementing the variable inductance and converts into voltage. A trans-conductance unit converts the inductance current value, which is sensed by the sensing resistor, into the sensed voltage control type current source. The trans-conductance unit calculates the amplification gain of the current of the aimed variable inductance. The trans-conductance unit compensates for the leakage current, which is caused by the resistance component in the circuit device including the sensing resistance which limits the ideal resonance function of the inductance-capacitance, based on the calculated amplification gain. |
