| 摘要 |
PURPOSE:To control forward and backward rotation of a motor with a single power supply. CONSTITUTION:A comparison arithmetic circuit 15 outputs a control voltage VC to be impressed to a drive coil 13 of a motor 11. An inverse amplifier circuit 17 inverses the control voltage VC with reference to a neutral point voltage VDD of a circuit power supply voltage and outputs an inversion signal V1. The comparison arithmetic circuit 15 is connected to the one end of the drive coil 13, while the inverse amplifier circuit 17 to the other end of the drive coil 13. The drive coil 13 drives a rotor magnet 12 depending on a potential difference between the control voltage VC and the inversion signal Vi. |
