APPARATUS FOR SAVING ELECTRICITY OF STEP-MOTOR IN TOMOGRAPHY

摘要

This invention is concerned with step motor driver. Especially even though step motor-used photographing bed is charged with input power without inputting clock signal to forward and backward, the current in the step motor does not run; then the power dissipation at the motor is reduced. Also step motor drive is insulated. The up/down counter which is operated by the clock signals drives step motor driver sequencially. Above up/down counter output terminal is connected to the multivibrator input terminal, and its output terminal is connected to the control terminal of the tri-state buffer (as shown fig.1).