| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical disk unit which allows an optical disk to be smoothly loaded and unloaded. SOLUTION: A motor drive control circuit 7 comprises a power amplifier portion 2 which drives a motor 1, a motor current detecting portion 3 which detects driving currents passed through the motor 1, an AD converting portion 4 which converts analog signals from the motor current detecting portion 3 into digital signals, a motor driving voltage control portion 5 which outputs optimum driving voltages to the motor 1 according to digital signals from the AD converting portion 4, and a DA converting portion 6 which converts digital signals from the motor driving voltage control portion 5 into analog signals. Thereby a motor driving voltage is increased with increase in motor 1 driving current. |
