Abstract: In an intelligent monitoring system, a wireless signal processing device transmits a wireless signal toward a first target object in a monitored area, receives a wireless status signal, and generates a monitoring signal corresponding to the first target object according to the wireless status signal. In addition, at least one signal-relaying device receives a back scattering signal, which is reflected from the first target object in response to the wireless signal, transfers the back scattering signal into the wireless status signal, and transmits the wireless status signal to the wireless signal processing device. The signal-relaying device includes a power supply device for supplying power for operations of the signal-relaying device, and the signal-relaying device is disposed in the monitored area between the first target object and the wireless signal processing device.

Abstract: In a testing circuit performing a testing operation to detect an RF circuit characteristic, a first filter unit is provided, having a first external terminal electrically coupled to a testing signal and a second external terminal electrically coupled to an RF circuit of the RF device. The first filter unit is configured to allow the testing signal to enter the RF circuit while blocking an RF signal transmitted in the RF circuit from entering the testing circuit. In addition, a testing-result informing unit is provided, having an external input electrically coupled to the first external terminal, and generating an informing signal, which indicates a condition of the RF circuit according to an electric level at the external input.

Abstract: An impedance matching structure is disposed on a circuit board for matching an impedance of a transmission line for transmitting an electronic signal. The structure includes: at least two redundant conducting sections coupled to different points between an input terminal and an output terminal of the transmission line, wherein the redundant conducting sections are apart from one another, and a first terminal of each of the redundant conducting sections is coupled to the transmission line, while a second terminal of each of the redundant conducting sections is apart from the transmission line; and at least one grounded conducting section, each of which corresponds to one of the redundant conducting sections, and surrounds in separation from the corresponding redundant conducting section, wherein each of the at least two redundant conducting sections is disposed in a corresponding plating hole.

Abstract: In a testing circuit performing a testing operation to detect an RF circuit characteristic, a first filter unit is provided, having a first external terminal electrically coupled to a testing signal and a second external terminal electrically coupled to an RF circuit of the RF device. The first filter unit is configured to allow the testing signal to enter the RF circuit while blocking an RF signal transmitted in the RF circuit from entering the testing circuit. In addition, a testing-result informing unit is provided, having an external input electrically coupled to the first external terminal, and generating an informing signal, which indicates a condition of the RF circuit according to an electric level at the external input.

Abstract: A characteristic impedance of an electric transmission line is measured by way of extraction. In the method, a first probe and a second probe are provided, wherein the first probe and the second probe are separable and independently operable probes. A first characteristic impedance of a first circuit where a first terminal of the first probe and a first terminal of the second probe are directly interconnected to each other is first measured. Then a second characteristic impedance of a second circuit where the first terminal of the first probe and the first terminal of the second probe are connected to opposite terminals of the electric transmission line, respectively, is measured. The characteristic impedance of the electric transmission line can then be obtained according to the first characteristic impedance and the second characteristic impedance.

Abstract: An IP camera includes a camera unit for picking up images of a target object; a wireless signal processing unit for transmitting an intelligent monitoring ng a wireless signal to the target object and receiving a scattering wireless signal reflected from the target object; and a signal processing unit electrically coupled to the camera unit and the wireless signal processing unit for receiving a data corresponding to the image of the target object from the camera unit and a data corresponding to the scattering wireless signal reflected from the wireless signal processing unit. The signal processing unit analyzes the data corresponding to the image of the target object to obtain a status ate information and generates a reference signal according to the status information, and the reference signal is processed together with the data corresponding to the scattering wireless signal by the signal processing unit to generate a change detection signal.

Abstract: The present invention is to provide a method for automatically configuring a gateway device through a mobile device, wherein the gateway device is installed with configuration software for connecting to a mobile device through a wireless communication unit thereof, and the mobile device is installed with automatic network connection software and configuration information. After activating the automatic network connection software, the mobile device reads the configuration information, searches for currently available wireless network device, establishes a peer-to-peer connection with the gateway device corresponding to the wireless network device whose Service Set Identifier (SSID) matches the SSID in the configuration information, and then activates the configuration software and sends the configuration information to the gateway device. Once the configuration software obtains the configuration information, a network connection configuration process of the gateway device is automatically completed.

Abstract: The present invention is to provide a chassis switch, which comprises a chassis for accommodating a designated number of line cards therein; a backplane installed on the back side of the chassis and having a plurality of connectors disposed thereon; at least one line card plugged into one of the connectors corresponding thereto via a front side of the chassis and each having an access switch chip adapted to switch local network signals and an interconnect switch chip adapted to switch the signals between ports of the at least one line card; and a loop adapted to connect the corresponding ports of the access switch chip and the interconnect switch chip respectively through the connectors, so as to enable each line card plugged into the chassis switch to perform a local network switching function and a switching function between the at least one line card.

Abstract: In an RF device, an RF circuit includes at least two RF transmitting/receiving elements; and an RF switch controlled to selectively electrically couple to one of the RF transmitting/receiving elements for transmitting/receiving an RF signal in response to a control signal. In addition, a testing circuit includes a first filter unit having a first external terminal electrically coupled to a testing signal and a second external terminal electrically coupled to the RF circuit, wherein the first filter unit is configured to allow the testing signal to enter the RF circuit while blocking an RF signal transmitted in the RF circuit from entering the testing circuit; and a testing-result informing unit having an external input electrically coupled to the first external terminal, and determining contents of the control signal according to an electric level at the external input.

Abstract: The present invention is to provide a fan control circuit, which includes a filter circuit for converting a pulse-width modulation (PWM) voltage signal into a DC voltage signal; an amplifier circuit having an input end for receiving the DC voltage signal and a static voltage signal and generating an amplified voltage signal at an output end thereof; a current expansion circuit configured to perform current expansion on the amplified voltage signal and thereby generate a driving voltage signal for a fan; and a feedback circuit connected between another input end of the amplifier circuit and an output end of the current expansion circuit so that magnitude of the driving voltage signal is in direct proportion to the duty cycle of the PWM voltage signal and is greater than or equal to a lowest driving voltage value of the fan when the duty cycle of the PWM voltage signal approaches zero.

Abstract: The present invention is to provide a resonance circuit, which is applicable to a circuit board of a first electronic device provided thereon with a circuit layout, a high-speed connector (e.g., a USB 3.0 connector) at a lateral side of the circuit layout for connecting with a second electronic device, and an antenna for enabling the circuit board to receive and transmit wireless information at a predetermined frequency. The connector and antenna are respectively connected to first and second connecting points of the circuit layout, and the distance between the two connecting points is not less than one wavelength. The resonance circuit is connected to a third connecting point of the circuit layout provided between the above two connecting points, such that the resonance frequency of the resonance circuit covers the reception and transmission frequencies of the antenna, for effectively inhibiting interference between the connector and the antenna.

Abstract: In an RF device, an RF circuit includes an RF circuit connector optionally coupling thereto an RF element for transmitting or receiving an RF signal; and a power supply module selectively outputting power to the RF circuit connector according to a control signal. In addition, a testing circuit includes a first filter unit having a first external terminal electrically coupled to a testing signal and a second external terminal electrically coupled to the RF circuit, wherein the first filter unit is configured to allow the testing signal to enter the RF circuit while blocking an RF signal transmitted in the RF circuit from entering the testing circuit; and a testing-result informing unit having an external input electrically coupled to the first external terminal, and determining contents of the control signal according to an electric level at the external input.

Abstract: In an RF device, an RF circuit includes an RF circuit connector optionally coupling thereto an RF element for transmitting or receiving an RF signal; and a power supply module selectively outputting power to the RF circuit connector according to a control signal. In addition, a testing circuit includes a first filter unit having a first external terminal electrically coupled to a testing signal and a second external terminal electrically coupled to the RF circuit, wherein the first filter unit is configured to allow the testing signal to enter the RF circuit while blocking an RF signal transmitted in the RF circuit from entering the testing circuit; and a testing-result informing unit having an external input electrically coupled to the first external terminal, and determining contents of the control signal according to an electric level at the external input.

Abstract: The present invention provides a relay-based foolproof circuit for over-voltage protection, which is electrically connected between a plug and an electric device, and includes a relay having at least one magnetic core, a coil wound around the magnetic core and two reed switches each having a reed and being normally in a closed state because of the elastic effect of its reed. The relay-based foolproof circuit is able to provide AC power of a first specification (e.g., 110 V AC power) received from the plug to the electric device. However, when AC power of a second specification (e.g., 220 V AC power) greater than the first specification flows through the coil, the coil causes the magnetic core to generate a magnetic force great enough to drive the two reed switches into an open state for stopping the AC power of the second specification from being provided to the electric device.

Abstract: A powered device, a power supply system and an operation mode selection method are provided. The power supply system includes a power sourcing equipment and the powered device. The powered device is electrically connected to the power sourcing equipment through an internet cable. The powered device includes a sensing module and a controlling module. The sensing module receives an internet signal from the power sourcing equipment through the internet cable, and outputs a switching signal according to the internet signal. The controlling module is used for selecting an operation mode of the powered device according to the switching signal.

Abstract: The present invention is to provide an electronic device capable of automatically resetting, which includes a main circuit system and an external circuit system. The main circuit system is able to send out a power supply state signal according to the voltage thereof and an activation state signal according to whether the main circuit system is properly activated. The external circuit system is able to receive the power supply state signal and the activation state signal, switch a switch between a turned-on state and a turned-off state for automatically cutting off electricity supplied to the main circuit system through the switch while the main circuit system is improperly activated and then supplying electricity to the main circuit system thereafter. Thus, whenever the electronic device is improperly activated, the electricity supplied to the main circuit system can be automatically cut off and then restored to reset the main circuit system automatically.

Abstract: A broadcasting system for AV program selection comprising a network, an AV signal providing system, a user device and a digital AV signal processing device is proposed. The network, the AV signal providing system, the user device and the digital AV signal processing device are in communication with each other via the network. A broadcasting method is applied to the AV signal providing system. The broadcasting method comprises steps of: providing a plurality of AV programs for selection; and transmitting an AV signal corresponding to a selected one of the plurality of AV programs to the digital AV signal processing device in response to a user's selecting operation on an AV program menu revealed by way of the digital AV signal processing device, wherein the AV program menu contains information of only partial the plurality of AV programs, and is created by way of the user device.

Abstract: A broadband power line network device includes a printed circuit board, a power converter, a network control chip, a network connector, and an Ethernet signal coupling device. The printed circuit board includes a primary layout region and a secondary layout region. The primary layout region and the secondary layout region are separated from each other by a first distance. The power converter includes a pair of power-receiving terminals for receiving an AC voltage, thereby converting the AC voltage into a DC voltage. The network control chip is disposed on the primary layout region for receiving the DC voltage. The network connector is disposed on the secondary layout region for transmitting or receiving an external network signal. The Ethernet signal coupling device is arranged between the primary layout region and the secondary layout region.

Abstract: The present invention provides a relay-based foolproof circuit for over-voltage protection, which is electrically connected between a plug and an electric device, and includes a relay having at least one magnetic core, a coil wound around the magnetic core and two reed switches each having a reed and being normally in a closed state because of the elastic effect of its reed. The relay-based foolproof circuit is able to provide AC power of a first specification (e.g., 110 V AC power) received from the plug to the electric device. However, when AC power of a second specification (e.g., 220 V AC power) greater than the first specification flows through the coil, the coil causes the magnetic core to generate a magnetic force great enough to drive the two reed switches into an open state for stopping the AC power of the second specification from being provided to the electric device.

Abstract: The present invention is to provide a fan control circuit, which includes a filter circuit for converting a pulse-width modulation (PWM) voltage signal into a DC voltage signal; an amplifier circuit having an input end for receiving the DC voltage signal and a static voltage signal and generating an amplified voltage signal at an output end thereof; a current expansion circuit configured to perform current expansion on the amplified voltage signal and thereby generate a driving voltage signal for a fan; and a feedback circuit connected between another input end of the amplifier circuit and an output end of the current expansion circuit so that magnitude of the driving voltage signal is in direct proportion to the duty cycle of the PWM voltage signal and is greater than or equal to a lowest driving voltage value of the fan when the duty cycle of the PWM voltage signal approaches zero.