Abstract: A signal transmitting apparatus being used in a network device includes a voltage-controlled current source for outputting a current signal according to an input digital signal; a line driver for outputting a voltage signal according to the current signal; at least one impedance-matching unit, which is coupled to the line driver, for impedance-matching at the output of the line driver; and a first correction unit, which is coupled to the voltage-controlled current source, for outputting a first correction signal to adjust the current signal outputted from the voltage-controlled current source.

Abstract: The present invention is a module for increasing total track, especially an application to an optical capturing device, thus the module for increasing total track may change its total track without re-laying out reflection positions and space in said optical capturing device; there are plural kinds of modules to be designed for different total tracks in the present invention, and said modules can be easily and fast substituted in the optical capturing device. The present invention is based on a theory of an incident angle equal to an ejective angle, thus a merge point can be predetermined by an incident light path and an ejective light path; aforesaid phenomenon is not only suitable an one-time reflection, but also plural reflections, and it can be applied in a module with either one reflection element or plural reflection elements.

Abstract: A multi-layer printed circuit board having a low noise characteristic, the multi-layer printed circuit board includes: at least one circuit layer; at least one isolation line for dividing the at least one circuit layer into at least two areas, the at least one isolation line forms an open pattern and the at least one isolation line extendedly forms a long neck line into the at least one area, and an internal opening of the long neck line located at a geometric center of the at least one area to improve the isolation, especially for the noises near the resonant frequencies of the isolation areas.

Abstract: A method for suppressing the resonant effect between capacitors connected in parallel is disclosed. By adjusting the length of the transmission line of the shunt capacitors, the performance of the shunt capacitors, which can be applied on various types of filtering circuits, can be improved in the desired bandwidth.

Abstract: A compensation apparatus for image scan, applied to an optical scanner with a platform, on which an object to be scanned is disposed. The optical scanner has a photosensitive apparatus with a set of scan photosensitive devices and a storage apparatus. When the object is scanned by the set of scan photosensitive devices, a scanned image is obtained and saved in the storage apparatus temporarily. The compensation apparatus has a set of calibration boards, a set of calibration photosensitive devices and an image processor. The set of calibration boards has two calibration boards located at two sides of the platform. The set of calibration photosensitive devices is located at two sides of the set of scan photosensitive device. The image processor is used to extract and compare the calibrated image, so as to adjust the scanned image.

Abstract: The present invention relates to a printed circuit board with low noise. A voltage source layer and a ground layer of the printed circuit board are divided into an analog area and a digital area respectively via an isolation line, and adapted to conduct voltage source signal and ground signal respectively. Because the isolation line is an open pattern and a capacitor adapts to position near the opening, the noise and the electro-magnetic parameter of the printed circuit board are reduced.

Abstract: A network transmitter and an associated transmitting method are disclosed. The network transmitter includes a signal converter and a signal driver. The former can convert an input signal into a current signal, and the latter can output a differential transmission signal according to the current signal. The signal driver includes a feedback network which can switch between a first configuration and a second configuration.

Abstract: A multi-layer printed circuit board having a low noise characteristic, the multi-layer printed circuit board includes: at least one circuit layer; at least one isolation line for dividing the at least one circuit layer into at least two areas, the at least one isolation line forms an open pattern and the at least one isolation line extendedly forms a long neck line into the at least one area, and an internal opening of the long neck line located at a geometric center of the at least one area to improve the isolation, especially for the noises near the resonant frequencies of the isolation areas.

Abstract: A multi-layer printed circuit board having a low noise characteristic, the multi-layer printed circuit board includes at least one circuit layer; at least one isolation line for dividing the at least one circuit layer into at least two areas, the at least one isolation line forming an open pattern and the at least one isolation line extendedly forming a long neck line into the at least one area; and at least one capacitor placed at one side of the opening of the open pattern in any one of the areas.

Abstract: A transceiver in a full duplex communication system includes a transmitting circuit coupled to a channel for transmitting a transmit signal to the channel, a cancellation signal generator coupled to the channel for generating a cancellation signal according to the transmit signal, and an echo cancellation device coupled to the transmitting circuit and the cancellation signal generator for attenuating an echo corresponding to the transmit signal with the cancellation signal.

Abstract: An echo cancellation apparatus of a transceiver in a full duplex communication system is disclosed. The full duplex communication system includes a transmitter section for transmitting a transmit signal and a receiver section for receiving a receive signal. The echo cancellation device includes an echo cancellation signal generator coupled to the transmitter section for receiving the transmit signal and for generating an echo cancellation signal according to the transmit signal, a load resistor and a parasitic capacitor of the transceiver; and a calculation module coupled to the transmitter section, the receiver section, and the echo cancellation signal generator for receiving the receive signal and for eliminating at least high frequency components of the echo signal.

Abstract: A signal transmitting apparatus being used in a network device includes a voltage-controlled current source for outputting a current signal according to an input digital signal; a line driver for outputting a voltage signal according to the current signal; at least one impedance-matching unit, which is coupled to the line driver, for impedance-matching at the output of the line driver; and a first correction unit, which is coupled to the voltage-controlled current source, for outputting a first correction signal to adjust the current signal outputted from the voltage-controlled current source.

Abstract: An echo cancellation device for a full duplex communications system is provided. The full duplex communication system has a transmitter for transmitting a transmit signal and a receiver for receiving a receive signal. The echo cancellation device has a filter for outputting a filter signal according to the transmit signal, an echo cancellation circuit connected to the filter for outputting an echo cancellation signal according to the filter signal, at least one echo cancellation resistor connected to the transmitter, the receiver, and the echo cancellation circuit, and an echo cancellation detection circuit for outputting a control signal according to an echo residue at the receiver to control the filter.

Abstract: The present invention relates to a printed circuit board with low noise. A voltage source layer and a ground layer of the printed circuit board are divided into an analog reason and a digital area respectively via an isolation line, and adapted to conduct voltage source signal and ground signal respectively. Because the isolation line is an open pattern and a capacitor adapts to position near the opening, the noise and the electro-magnetic parameter of the printed circuit board are reduced.

Abstract: An optical storage medium reading device comprising an optical storage module, a light-switching module, a wave-distance-dividing module and an optical sensor module is provided. The optical storage module contains an optical storage medium. The light-switching module selects a final light source according to the type of optical storage medium and projects the light from the selected final light source outward. The wave-distance-dividing module divides the final light source from the light-switching module into equidistant light sources and projects the light onto the optical storage medium. The optical sensor module identifies the data stored within the optical storage medium according to the light reflected from the optical storage medium.

Abstract: A file managing method for a digital apparatus includes (a) establishing a folder corresponding to a file type generated in an operational mode of the digital apparatus, and (b) storing a file according to its file type to the folder corresponding to the file type established in step (a).

Abstract: A network device comprises a hybrid-mode transmitter for transmitting a differential transmission signal at a first transmission rate or a second transmission rate. The network device includes a first mode channel and a second mode channel. The first mode channel includes a voltage mode driver and a current mode driver for outputting the differential transmission signal. The second mode channel includes a second mode driver, which is one of a voltage mode driver and a current mode driver. The network device transmits the differential transmission signal at the first transmission rate through the voltage mode driver of the first mode channel and the second mode driver. The network device transmits the differential transmission signal at the second transmission rate through at least one of the current mode driver and the voltage mode driverfirst mode channel.

Abstract: Light source module mainly comprises a reflector and a lamp is provided. The reflector comprises a light output section, and a portion of the reflector corresponding to the light output section comprises at least one protrusion. The lamp is disposed in the reflector, and the light emitted by the lamp is reflected onto other portions of the reflector via the protrusions of the reflector, and then output from the light output section. Further, a portion of the reflector corresponding to the light output section is designed as a curve F, and a portion of the reflector adjacent to the light output section is designed as a reflective surface S. The curve F is connected to the reflective surface S, and the curve F=∫dFdS=∫(ax+by+c)dS, wherein dF is a differential plane that constructs the curve F, dS is a differential plane that constructs the reflective surface S, and (a, b) is a normal vector of the differential plane dF.

Abstract: A variable-curvature lens system and a method for adjusting curvature thereof are provided. The variable-curvature lens system includes a plurality of lenses having at least one plastic lens and a thermal controller associated with the plastic lens. The curvature of the plastic lens is determined depending upon the ambient temperature controlled by the thermal controller. When the lens system is adapted to an image readout apparatus, a focus length of the whole lens system mates with an optimum MTF value can be obtained by way of controlling ambient temperature of the plastic lens by the thermal controller. A high-performance, high-resolution image output thus can be provided.

Abstract: A method for optimizing arrangement of a light source array, suitable for use in an optical scan module having an array of light sources and a sub-system assembled by other members. The optical response of the sub-system of the optical scan module is fixed. The measurements of optical response matrices of the optical scan module and the array of light sources are respectively obtained to calculate the constant value of the optical response matrix of the sub-system. The optimal value of the optical response matrix of the optical scan module is then set up to calculate the optimal value of the optical response matrix of the array of light sources. In response to the optimal value, a method of optimizing arrangement of the light source array is configured.