Abstract: A laser power control system and related method for reducing a settling time in a target laser power transition are disclosed. The laser power control system includes a state decision circuit, for generating a state decision signal according to a selected operational state of a target circuit; a plurality of buffers, for storing a plurality of control data corresponding to a plurality of candidate operational states of the target circuit respectively; and a multiplexer, coupled between the state decision circuit and the buffers, for coupling a selected buffer of the buffers and the target circuit according to the state decision signal for outputting a control datum stored in the selected buffer to the target circuit.

Abstract: A signal processing apparatus includes sample and hold units for holding a plurality of analog photo diode signals. A signal holding controller generates control signals to the sample and hold units for holding the analog photo diode signals. Analog adjusting modules adjust the held analog photo diode signals. A multiplexer selectively couples one input end of the multiplexer to the output end of the multiplexer for outputting the adjusted analog photo diode signals. An analog to digital converter converts the adjusted analog photo diode signals into digital photo diode signals.

Abstract: A method for controlling a specific output power level emitted from a laser diode (LD) in an optical pick-up head unit (OPU) is disclosed. The LD is configured to provide a plurality of output power levels for accessing/recording an optical disc. The method includes: determining a specific power control value according to a first output power level, a second output power level, a first power control value of the first output power level, and the specific output power level, wherein the first output power level is less than the specific output power level and greater than the second output power level; and driving the LD to emit the specific output power level according to the specific power control value, the first power control value, and a second power control value of the second output power level.

Abstract: The invention provides a wobble detection circuit. An exemplary embodiment of the wobble detection circuit comprises an automatic gain control module, an analog to digital converter, a digital band pass filter, and a digital band pass filter. The automatic gain control module amplifies a first input signal and a second input signal detected by a pickup head to the same magnitude to obtain a first amplified signal and a second amplified signal. The adder then subtracts the second amplified signal from the first amplified signal to obtain an analog wobble signal. The analog to digital converter then converts the analog wobble signal to a first digital wobble signal. Finally, the digital band pass filter accepts frequency components of the first digital wobble signal within a pass band and rejects frequency components of the first digital wobble signal outside the pass band to obtain a second digital wobble signal.

Abstract: A fixing device is provided. The fixing device is fixed to a surface, comprising a sucker, a rack, a gear, a transforming unit and a limiting unit. The rack is connected to the sucker. The gear is engaged to the rack. The transforming unit is connected to the gear. The transforming unit rotates the gear to move the rack between a first position and a second position. The rack pushes the sucker to apply a suction force to the surface when the rack is in the first position, and the suction force of the sucker is released when the rack is in the second position. The limiting unit is connected to the rack to restrict the rack.

Abstract: An optical storage device and a blank detection method thereof are disclosed. An RF signal is obtained from an optical disc. A various gain amplifier amplifies the RF signal based on a control signal. An analog to digital converter samples the amplified RF signal to obtain a data signal. An auto gain controller updates the control signal based on amplitude of the data signal. A blank detector detects blankness of the data signal based on a threshold. The threshold is provided by a threshold generator based on the control signal. If the amplitude of the data signal does not exceed the threshold, the blank detector sends a hold signal to suspend update of the control signal.

Abstract: The invention provides a sliding mechanism and an electronic device using the same. The sliding mechanism includes a bottom plate, a connection rod, a cover plate, an elastic member, and a connection member. Guiding sections are formed at two sides of the bottom plate, and the bottom plate has a first fastening hole and an arc-shaped groove. The connection rod has a first end and a second end. Sliding portions are formed at two sides of the cover plate to cooperate with the guiding sections to enable the cover plate to slide relative to the bottom plate, and the cover plate has a second fastening hole and a connection hole. The elastic member includes a third end and a fourth end. Furthermore, the connection member slidably fastens the fourth end of the elastic member and the second end of the connection rod to the arc-shaped groove through the connection hole.

Abstract: A rotary supporting structure without drawing is provided. A base is designed to have a protrusion to cooperate with a locating hole of an electronic device to make the base rotate between the accommodating position coinciding with the bottom surface of the electronic device and the supporting position intersecting with the bottom surface without drawing. The tenons used in the conventional design are replaced, and thus the operation is more convenient. The base is composed of an upper lid and a lower lid, and this may overcome the thickness limitation of the conventional single plastic component and provide stable support.

Abstract: A clock generation circuit is provided and includes a phase locked loop (PLL) and a calibrator. The PLL is arranged to receive a first clock signal and generate the output clock signal. The PLL adjusts the frequency of the output clock signal according to a control signal. The calibrator is arranged to receive the output clock signal and a second clock signal, execute a frequency calibration between the output clock signal and the second clock signal, and generate the control signal according to results of the frequency calibration.

Abstract: A device for controlling access to an optical disc includes a control word calculator and a numerically controlled oscillator (NCO). The control word calculator is arranged to calculate a control word corresponding to a radius where the optical disc is accessed. In addition, the NCO is arranged to generate an output frequency according to the control word, wherein the output frequency is utilized for accessing the optical disc. An associated method for controlling access to an optical disc includes: calculating a control word corresponding to a radius where the optical disc is accessed; and generating an output frequency according to the control word, wherein the output frequency is utilized for accessing the optical disc.

Abstract: A pre-pit signal generating device includes: a first slicer for generating a sliced signal corresponding to a push-pull signal based on a first reference level; a duty ratio controller coupled to the first slicer for adjusting the first reference level or the push-pull signal to control a duty ratio of the sliced signal to a predetermined ratio; a reference level generator coupled to the duty ratio controller for generating a second reference level corresponding to the first reference level; and a second slicer coupled to the reference level generator for generating a first pre-pit signal corresponding to the push-pull signal based on the second reference level.

Abstract: A device for detecting wobbles on an optical disc is provided, where the device is utilized for generating a wobble signal according to a plurality of detection signals. The device includes an analog signal processing circuit, a pair of analog-to-digital converters (ADCs), and a digital signal processing circuit. The analog signal processing circuit is arranged to perform analog signal processing on the detection signals to generate a plurality of output signals. In addition, the pair of ADCs are arranged to digitalize the output signals to generate a plurality of digital values. Additionally, the digital signal processing circuit is arranged to perform digital signal processing on the digital values and generate an arithmetic output, where the arithmetic output is utilized for generating the wobble signal or utilized as the wobble signal. An associated method for detecting wobbles on an optical disc is further provided.

Abstract: A control circuit and a control method of controlling a rotation frequency of a spindle in an optical disc drive, the control circuit comprising: a spindle controller, electrically coupled to the spindle, for driving the spindle to rotate an optical disc according to a rotation control signal; a detector, electrically coupled to the spindle controller, for detecting the rotation frequency and for generating detecting signals; a frequency-adjusting module, electrically coupled to the detector, for adjusting at least one of the detecting signals to reduce a rotation frequency difference between detecting signals; a signal selector, electrically coupled to the frequency-adjusting module, for receiving output signals generated from the frequency-adjusting module and then outputting the rotation control signal.

Abstract: A method for controlling laser power of an optical pickup unit (OPU) includes: providing a first relationship between the laser power and a driving parameter, wherein the driving parameter is utilized for driving a laser diode (LD) of the OPU, and the first relationship corresponds to a first temperature; utilizing a temperature-related model to convert the first relationship into a second relationship between the laser power and the driving parameter, wherein the second relationship corresponds to a second temperature; and storing the first relationship for being utilized at the first temperature, and storing the second relationship for being utilized at the second temperature.

Abstract: A method for deriving precise control over laser power of an optical pickup unit (OPU) includes: providing an analog-to-digital converter (ADC) within an automatic power calibration (APC) circuit to derive a path gain and/or a path offset from the APC circuit; and selectively performing compensation according to the gain and/or the path offset, in order to maintain precision of a relationship between the laser power and a target command utilized for controlling the laser power. An associated APC circuit comprising an ADC and at least one compensation module is further provided. The ADC is utilized for deriving a path gain and/or a path offset from the APC circuit. The compensation module is utilized for selectively performing compensation according to the path gain and/or the path offset, in order to control the laser power by a target command.

Abstract: An automatic power control system, a down sampling circuit and a down sampling method. The automatic power control system is incorporated in an optical disc drive comprising a laser diode for receiving a control signal to generate a laser beam; and a photodetector for detecting the laser beam to generate an analog input signal. The automatic power control system comprises an analog-to-digital converter, a down sampling circuit, a comparator, and a digital-to-analog converter. The analog-to-digital converter converts the analog input signal to digital data. The down sampling circuit, coupled to the analog-to-digital converter, comprises a down sampler, a counter, and a controller. The down sampler receives a predetermined amount of digital data to generate representation data. The counter, coupled to the down sampler, calculates the amount of digital data, and resets the down sampler when the amount equals or exceeds the predetermined count.

Abstract: An automatic power control system, a down sampling circuit and a down sampling method. The automatic power control system is incorporated in an optical disc drive comprising a laser diode for receiving a control signal to generate a laser beam; and a photodetector for detecting the laser beam to generate an analog input signal. The automatic power control system comprises an analog-to-digital converter, a down sampling circuit, a comparator, and a digital-to-analog converter. The analog-to-digital converter converts the analog input signal to digital data. The down sampling circuit, coupled to the analog-to-digital converter, comprises a down sampler, a counter, and a controller. The down sampler receives a predetermined amount of digital data to generate representation data. The counter, coupled to the down sampler, calculates the amount of digital data, and resets the down sampler when the amount equals or exceeds the predetermined count.

Abstract: A device for processing a radio frequency (RF) signal of an optical disk drive includes a high-pass (HP) filter, an RF variable gain amplifier (VGA), an RF analog-digital converter (ADC), and a digital module. The HP filter filters the RF signal and is capable of selectively utilizing one of a first cut-off frequency and a second cut-off frequency. The RF VGA amplifies the filtered RF signal. The RF ADC converts the amplified RF signal into a digital code. The digital module is capable of executing a first function and a second function with the digital code. The HP filter utilizes the first cut-off frequency when the digital module desires to execute the first function, and the HP filter utilizes the second cut-off frequency when the digital module desires to execute the second function.

Abstract: An identifiable TAB for an inkjet cartridge. The identifiable tab contains a flexible substrate, a plurality of conductive traces formed on the flexible substrate, and a plurality of contacts formed on the flexible substrate and connected to the conductive traces. The contacts of the identifiable TAB are arranged into at least one identifiable area for aiding in identifying the inkjet cartridge.

Abstract: A memory sharing method for at least a functional module and a target module is disclosed. The functional module includes at least a static random access memory (SRAM), the memory sharing method includes the steps of calculating a memory capacity of the functional module; if a total memory capacity of a module group satisfies a memory capacity requirement of the target module, allocating the SRAM of the module group, wherein the module group comprises at least one functional module; and accessing the SRAM of the functional module of the module group by utilizing the target module.