Abstract: An inductive breathing mask is provided, which comprises a covering shell, a mask pad, and a pressure inductive unit, wherein the pressure inductive unit comprising at least one pressure inductive part, and the pressure inductive part is disposed on the mask pad where corresponds to at least one of the user's nasion, left cheek beside nose, right cheek beside nose, and chin for detecting the pressure of the user's nasion, left cheek beside nose, right cheek beside nose, and chin generated by the mask pad. In addition, the inductive breathing mask of the present invention may further be integrated with other functional elements for constructing a respiratory care system having warning and/or monitoring functions.

Abstract: A hardware status detecting circuit for detecting a hardware status of a target apparatus includes a plurality of hardware status detectors operating in response to the hardware status of the target apparatus, and a signal processing unit coupled to the hardware status detectors for generating a hardware status detecting signal having information of operational statuses of the hardware status detectors embedded therein.

Abstract: A spherical aberration compensation method of an optical storage device is provided. The method includes: deriving a first spherical aberration compensation value corresponding to a first track position on a recording layer of an optical storage medium to serve as a first reference value; deriving a second spherical aberration compensation value corresponding to a second track position on the recording layer of the optical storage medium to serve as a second reference value; and estimating a third spherical aberration compensation value corresponding to a third track position on the recording layer of the optical storage medium according to the first and second reference values.

Abstract: A seeking control system in an optical disc drive is disclosed. The system comprises a servo controller, a velocity control unit, and a switch unit. The servo controller receives a central servo signal to output a first tracking control signal for the tracking coil. The velocity control unit receives a tracking error signal to determine a velocity of the pickup head and compares the velocity of the pickup head with a predetermined velocity profile to generate the second tracking control signal. The switch unit outputs the second tracking control signal instead of the first tracking control signal to the motor driver to control the pickup head moving steadily.

Abstract: An optical disc drive includes a pickup head for receiving a reflective light from an optical disc and detecting a reflection signal accordingly, a derived signal generator for generating a derived signal derived from the reflection signal, an envelop generator for filtering the derived signal to generate an envelop of the derived signal, and a controller for receiving the envelop of the derived signal, comparing the envelop of the derived signal with a threshold, and controlling the optical disc drive entering a protection mechanism, when the envelop crosses the threshold in a predetermined time.

Abstract: A optical disk drive long distance seek control device and method thereof, capable of feeding back the optical head control device through the step motor control device during the long distance seek; wherein, the step motor control device comprises a velocity profile generator capable of producing a quadratic profile to stabilize the step motor when finishing the seek; and more particular, the optical head control device uses a center error signal and a velocity error signal alternatively; moreover, the velocity error signal can be adjusted according to the output signals from the optical head control device and the step motor control device through a weighting mechanism.

Abstract: A optical disk drive long distance seek control device and method thereof, capable of feeding back the optical head control device through the step motor control device during the long distance seek; wherein, the step motor control device comprises a velocity profile generator capable of producing a quadratic profile to stabilize the step motor when finishing the seek; and more particular, the optical head control device uses a center error signal and a velocity error signal alternatively; moreover, the velocity error signal can be adjusted according to the output signals from the optical head control device and the step motor control device through a weighting mechanism.

Abstract: A compensator circuit comprises a phase-lead compensator for receiving an error signal generated by an optical storage device and generating a phase-lead error signal, a band-pass filter connected in parallel with the lead compensator for magnifying a rotating frequency error signal and generating a filtered signal, and an adder for synthesizing the phase-lead error signal and the filtered signal so as to reduce a steady-state error of the error signal. The compensator circuit does not comprise any phase-lag compensator.