Abstract: There is disclosed an information storage apparatus in which even when a remaining power of a battery or a galvanic cell is low, an information recording medium can safely be removed. An MPU, a spindle motor driver, and a spindle motor constitute a decelerator for decelerating rotation of the information recording medium, and as a deceleration mode, a first deceleration mode with a relatively large power consumption and a second deceleration mode with a relatively small power consumption are used. The MPU monitors a voltage of a power supply line via a DSP, decelerates the rotation of the information recording medium in the first deceleration mode when the voltage exceeds a predetermined level, and decelerates the rotation of the information recording medium in the second deceleration mode when the voltage indicates the predetermined level or less.

Abstract: There is disclosed an information storage apparatus in which even when a remaining power of a battery or a galvanic cell is little, an information recording medium can safely be taken out. An MPU 12, a spindle motor driver 38, and a spindle motor 40 constitute a decelerator for decelerating rotation of the information recording medium, and as a deceleration mode, a first deceleration mode with a relatively large power consumption and a second deceleration mode with a relatively small power consumption are disposed. The MPU 12 monitors a voltage of a power supply line 13 via a DSP 16, decelerates the rotation of the information recording medium in the first deceleration mode when the voltage exceeds a predetermined level, and decelerates the rotation of the information recording medium in the second deceleration mode when the voltage indicates the predetermined level or less.

Abstract: The present invention relates to a storage device and a servo recovery method for the storage device, which restores the head to a track when the head goes off from the track of a storage medium, and whereby it prevents the servo recovery process from being continuously called over a short period of time. The storage device comprises a storage medium, a head and a control circuit which performs the servo recovery process. The servo recovery process, having multiple recovery processes, is called up when off track is detected. The frequency that the recovery process is called up is detected, and one of the multiple recovery processes is executed according to the detected call-up frequency. A different recovery process is performed when the call-up frequency is high, therefore this recovery process makes it possible to prevent frequent occurrence of the off-track state.

Abstract: There is disclosed an information storage apparatus with a low current consumption in a spindle motor or the like. A spindle motor driver 38 and spindle motor 40 serve as both a driver for driving a disk-like information storage medium in a predetermined direction and a brake for forcibly stopping rotation of the information storage medium, and by appropriately inputting, to the spindle motor driver 38, a spindle-on signal SPDLON for operating the spindle motor driver 38 and spindle motor 40 as the driver and a brake signal BRAKE for operation as the brake, MPU selectively uses a forced stop operation for stopping driving the information storage medium to forcibly stop the information storage medium, and a natural stop operation in which the spindle motor 40 simply stops driving the information storage medium.

Abstract: This invention relates to a control method, control device, and drive circuit for controlling the rpm of a spindle motor in order to reduce the rise time of the spindle motor. There is a discharge circuit (91-2) in the charge pump (91) of a spindle-motor driver (38). A control circuit (12) detects when the rpm of the spindle motor reaches near a target rpm, and discharges the charge pump (91). In this way, the rotation error near the target rpm is discharged, so it is possible to control and suppress overshoot. This makes it possible to reduce the rise time.

Abstract: There is disclosed an information storage apparatus in which even when a remaining power of a battery or a galvanic cell is little, an information recording medium can safely be taken out. An MPU 12, a spindle motor driver 38, and a spindle motor 40 constitute a decelerator for decelerating rotation of the information recording medium, and as a deceleration mode, a first deceleration mode with a relatively large power consumption and a second deceleration mode with a relatively small power consumption are disposed. The MPU 12 monitors a voltage of a power supply line 13 via a DSP 16, decelerates the rotation of the information recording medium in the first deceleration mode when the voltage exceeds a predetermined level, and decelerates the rotation of the information recording medium in the second deceleration mode when the voltage indicates the predetermined level or less.

Abstract: This invention relates to a control method, control device, and drive circuit for controlling the rpm of a spindle motor in order to reduce the rise time of the spindle motor. There is a discharge circuit 91-2 in the charge pump 91 of a spindle-motor driver 38. A control circuit 12 detects when the rpm of the spindle motor reaches near a target rpm, and discharges the charge pump 91. In this way, the rotation error near the target rpm is discharged, so it is possible to control and suppress overshoot. This makes is possible to reduce the rise time.

Abstract: There is disclosed an information storage apparatus with a low current consumption in a spindle motor or the like. A spindle motor driver 38 and spindle motor 40 serve as both a driver for driving a disk-like information storage medium in a predetermined direction and a brake for forcibly stopping rotation of the information storage medium, and by appropriately inputting, to the spindle motor driver 38, a spindle-on signal SPDLON for operating the spindle motor driver 38 and spindle motor 40 as the driver and a brake signal BRAKE for operation as the brake, MPU selectively uses a forced stop operation for stopping driving the information storage medium to forcibly stop the information storage medium, and a natural stop operation in which the spindle motor 40 simply stops driving the information storage medium.