Abstract: An electrical device and a loop control method are provided. A data signal is obtained from a front end. A variable gain amplifier amplifies the data signal based on a gain value. An analog to digital converter samples the amplified data signal output therefrom to generate a digital data signal. A peak bottom detector detects a peak level and a bottom level of the digital data signal. A threshold controller compares the peak and bottom levels with a threshold value, and generates a first control signal accordingly. An auto gain controller updates the gain value based on the peak and bottom levels with a first step size. The first step size is determined by the first control signal.

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: An apparatus for detecting the wobble carrier frequency of an optical disk is disclosed. The apparatus comprises an offset canceller, a binary conversion module, an adjustable band pass filter, and a frequency detection module. The offset canceller cancels the direct current offset of a first wobble signal to obtain a second wobble signal. The binary conversion module converts the second wobble signal to a binary data stream. The adjustable band pass filter passes only an adjustable frequency range of the binary data stream to generate a filtered signal, wherein the center frequency of the adjustable frequency range is sequentially adjusted. The frequency detection module then determines maximum amplitude of the filtered signal, and determines the center frequency of the adjustable frequency range according to which the filtered signal with the maximum amplitude is generated, wherein the wobble carrier frequency is the center frequency corresponding to the maximum amplitude.

Abstract: The invention provides an apparatus for demodulating an Address In Pre-groove (ADIP) symbol. The ADIP symbol is carried by a wobble signal of an optical disk and comprises a series of ADIP bits permuted according to one of a plurality of permutation patterns to make up the ADIP symbol. A wobble extraction module extracts the wobble signal from the optical disk. A reference wobble generator generates a reference wobble with the same frequency and phase as a fundamental frequency and phase of a positive wobble cycle of the wobble signal. A waveform difference measurement module then measures a difference between the wobble signal and the reference wobble to obtain a series of difference measurement values respectively corresponding to the ADIP bits. A pattern matching module then compares probabilities of the permutation of the ADIP bits agreeing with each of the permutation patterns according to the difference measurement values to determine the ADIP symbol.

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 composite mode transducer for dissipating heat generated by a heat generating element is disclosed. The composite mode transducer includes a transducing module and connection elements. The transducing module includes first and second transducing elements connected in parallel. The connection elements are connected to resonance nodes of the first and second transducing elements. The first and second transducing elements are driven by a multiple-frequency resonance circuit, to produce resonance vibration of composite modes at resonance vibration frequencies of the system. The resulting advantages by using the composite mode transducer are: elimination of local stress concentration, and enhancement of efficiency, endurance and stability of the system. Accordingly, drawbacks of the prior art are overcome. The present invention further provides a cooling device with the composite mode transducer.

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: 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 phase detection device comprising an analog-digital converter, an interpolator, and a determining unit. The analog-digital converter receives an analog signal and converts the analog signal to a digital signal according to a plurality of digital sampling points. The interpolator generates a plurality of interpolation points according to a predetermined amount of digital sampling points. The determining unit obtains a phase of the ZC point according to the interpolation points or the digital sampling points.

Abstract: A composite conductive film formed of a polymer-matrix and a plurality of conductive lines less than micro-sized and its fabricating method are provided. The conductive lines are arranged parallel and spaced apart from each other so as to provide anisotropic conductivity. The present conductive film can serve as an electrical connection between a fine-pitch chip and a substrate. Additionally, an adhesive layer is formed on two opposite sides of the conductive film along its conductive direction to increase adhesive areas. The strength and reliability of the package using the conductive film are thus enhanced.

Abstract: A composite conductive film formed of a polymer-matrix and a plurality of conductive lines less than micro-sized and its fabricating method are provided. The conductive lines are arranged parallel and spaced apart from each other so as to provide anisotropic conductivity. The present conductive film can serve as an electrical connection between a fine-pitch chip and a substrate. Additionally, an adhesive layer is formed on two opposite sides of the conductive film along its conductive direction to increase adhesive areas. The strength and reliability of the package using the conductive film are thus enhanced.

Abstract: An encapsulation composition for pressure signal transmission including a flexible and low modulus epoxy resin as a substance in combination with plastic balls with pressure signal transmission properties as filler is provided. Therefore, the pressure signal is transmitted by utilizing the property of easy deformation of the flexible epoxy resin under pressure. And the effect of signal transmission is enhanced by the contact between plastic balls. The encapsulation composition is used in a sensor for transmitting pressure signals. The encapsulation composition is hydrophobic, so an electronic device of the sensor can be protected against moisture or water to extend its lifetime. Compared with traditional sensors using liquid for transmitting pressure signal, this sensor using solid encapsulation composition has advantages such as easy production and processing.

Abstract: A composite mode transducer for dissipating heat generated by a heat generating element is disclosed. The composite mode transducer includes a transducing module and connection elements. The transducing module includes first and second transducing elements connected in parallel. The connection elements are connected to resonance nodes of the first and second transducing elements. The first and second transducing elements are driven by a multiple-frequency resonance circuit, to produce resonance vibration of composite modes at resonance vibration frequencies of the system. The resulting advantages by using the composite mode transducer are: elimination of local stress concentration, and enhancement of efficiency, endurance and stability of the system. Accordingly, drawbacks of the prior art are overcome. The present invention further provides a cooling device with the composite mode transducer.

Abstract: A metal-supporting photocatalyst includes a metal deposit and nano-particles of a photocatalyst dispersed on the metal deposit. Preferably, the metal deposit is a metal electro-deposit. More preferably, the metal deposit has a dendritic structure. A method for preparing a metal-supporting photocatalyst, including forming a metal deposit of a supporting metal, and forming nano-particles of a photocatalyst on the metal deposit, is also disclosed.

Abstract: A focus controller and a focus control method are provided. The method allows the optical access apparatus focus from a current data layer onto a target layer. Each of the current layer and the target layer corresponds to a Spherical Aberration Compensation (SAC) value and a focus error related parameter. The method adjusts the SAC value in use to a temporary SAC value, adjusts the focus error related parameter in use to a temporary focus error related parameter, focuses on the target layer, adjusts the focus error related parameter in use to the focus error related parameter corresponding to the target layer, and adjusts the SAC value in use to the focus error related parameter corresponding to the target layer.

Abstract: A chlorine, fluorine and lithium co-doped transparent conductive film is provided, including chlorine, fluorine and lithium co-doped tin oxides, wherein the chlorine, fluorine and lithium co-doped tin oxides have a chlorine ion doping concentration not greater than 5 atom %, a fluorine ion doping concentration not greater than 5 atom %, and a lithium ion doping concentration not greater than 5 atom %.

Abstract: A composite conductive film formed of a polymer-matrix and a plurality of conductive lines less than micro-sized and its fabricating method are provided. The conductive lines are arranged parallel and spaced apart from each other so as to provide anisotropic conductivity. The present conductive film can serve as an electrical connection between a fine-pitch chip and a substrate. Additionally, an adhesive layer is formed on two opposite sides of the conductive film along its conductive direction to increase adhesive areas. The strength and reliability of the package using the conductive film are thus enhanced.

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: A composite mode transducer for dissipating heat generated by a heat generating element is disclosed. The composite mode transducer includes a transducing module and connection elements. The transducing module includes first and second transducing elements connected in parallel. The connection elements are connected to resonance nodes of the first and second transducing elements. The first and second transducing elements are driven by a multiple-frequency resonance circuit, to produce resonance vibration of composite modes at resonance vibration frequencies of the system. The resulting advantages by using the composite mode transducer are: elimination of local stress concentration, and enhancement of efficiency, endurance and stability of the system. Accordingly, drawbacks of the prior art are overcome. The present invention further provides a cooling device with the composite mode transducer.

Abstract: A quasi-optical material treatment apparatus includes a first mirror and a second mirror. The first mirror is arched, and has a focal point in a chamber distance, and a coupling port to receive a high power microwave from an external microwave source that travels along the chamber distance to output a strong field microwave beam. The second mirror and the first mirror jointly form a quasi-optical action chamber and are movable relative to each other to adjust the total chamber distance between the two. A material to be treated may be moved through a focusing zone (about one wavelength of the strong field microwave beam) of the strong field microwave beam to be treated rapidly and evenly.