| 摘要 |
PURPOSE:To provide a current detecting circuit for detecting a load current having variable magnitude at low cost while suppressing power consumption and fluctuation of power supply voltage. CONSTITUTION:The current detecting circuit comprises a motor 1, a voltage supply E1 for feeding the motor 1 with driving current, a lead wire 4 connected between the motor 1 and the voltage supply E1 and passing a driving current IF, and magnetic inductance elements 5, 6 for detecting the magnitude of the driving current IF flowing through the lead wire 4. The current detecting circuit further comprises a voltage supply E3 connected between one ends of the inductance elements 5, 6, and a multivibrator circuit 9 connected between the other ends of the inductance elements 5, 6 and further connected through the inductance elements 5, 6 with the voltage supply E3 in order to generate signals e1, e2 corresponding to the magnitude of the driving current IF. |
