Abstract: An oscillating device includes a first quartz crystal resonator, a driving circuit, a first buffer, a bandpass filter, a second quartz crystal resonator, and a second buffer coupled to each other. The driving circuit drives the first quartz crystal resonator to generate a first oscillating signal with a resonant frequency. The first buffer isolates from a load variation to generate a first clock signal in response to the first oscillating signal. The bandpass filter allows only the first clock signal with the harmonic frequency of the resonant frequency within a passband to pass through, thereby generating a filtered signal. The second quartz crystal resonator rectifies the filtered signal to generate a second oscillating signal having the harmonic frequency. The second buffer isolates from a load variation to generate a second clock signal in response to the second oscillating signal.

Abstract: An oscillating device includes a first quartz crystal resonator, a driving circuit, a first buffer, a bandpass filter, a second quartz crystal resonator, and a second buffer coupled to each other. The driving circuit drives the first quartz crystal resonator to generate a first oscillating signal with a resonant frequency. The first buffer isolates from a load variation to generate a first clock signal in response to the first oscillating signal. The bandpass filter allows only the first clock signal with the harmonic frequency of the resonant frequency within a passband to pass through, thereby generating a filtered signal. The second quartz crystal resonator rectifies the filtered signal to generate a second oscillating signal having the harmonic frequency. The second buffer isolates from a load variation to generate a second clock signal in response to the second oscillating signal.

Abstract: A dual-mode transmission device includes a dual-mode signal output port, a detection module and a signal mode switching module. The dual-mode signal output port is configured to switchably connect a data source to a DP signal receiving port or an HDMI signal receiving port. The detection module is configured for detecting the type of a signal receiving port connected to the dual-mode signal output port. The signal mode switching module converts the dual-mode signal output port into a DP specification signal output port according to the type of the signal receiving port, and connects to the DP signal receiving port accordingly; or converts the dual-mode signal output port into an HDMI specification signal output port, and connects to the HDMI signal receiving port. The signal mode switching module switches the DP and the HDMI specification signal output ports by detecting potentials of pins through the detection module.

Abstract: A motor drive system includes a precharge circuit having an intelligent charging and discharging mechanism. In terms of charging, a delay circuit can be used to delay a timing for turning on the low-impedance path, a detection circuit can also detect a system status and a battery voltage, and perform a discharge process in a non-driving mode and when the battery voltage continues to decrease. In the discharge process, a variety of applications can be realized using driving mechanism of the motor drive system.

Abstract: A motor drive system includes a precharge circuit having an intelligent charging and discharging mechanism. In terms of charging, a delay circuit can be used to delay a timing for turning on the low-impedance path, a detection circuit can also detect a system status and a battery voltage, and perform a discharge process in a non-driving mode and when the battery voltage continues to decrease. In the discharge process, a variety of applications can be realized using driving mechanism of the motor drive system.

Abstract: An oscillating device includes a first quartz crystal resonator, a driving circuit, a first waveform adjustment circuit, and at least two second quartz crystal resonators. The first quartz crystal resonator has a first resonant frequency. The driving circuit, coupled to the first quartz crystal resonator, drives the first quartz crystal resonator to generate a first oscillating signal having the first resonant frequency. The second quartz crystal resonators, coupled in parallel and coupled to the driving circuit and the first quartz crystal resonator, have a second resonant frequency and receive and rectify the first oscillating signal to generate a second oscillating signal having the second resonant frequency. The first waveform adjustment circuit, coupled to the second quartz crystal resonators, receives the second oscillating signal and adjusts the second oscillating signal to generate a first waveform adjustment signal.

Abstract: An oscillating device includes a first quartz crystal resonator, a driving circuit, a first waveform adjustment circuit, and at least two second quartz crystal resonators. The first quartz crystal resonator has a first resonant frequency. The driving circuit, coupled to the first quartz crystal resonator, drives the first quartz crystal resonator to generate a first oscillating signal having the first resonant frequency. The second quartz crystal resonators, coupled in parallel and coupled to the driving circuit and the first quartz crystal resonator, have a second resonant frequency and receive and rectify the first oscillating signal to generate a second oscillating signal having the second resonant frequency. The first waveform adjustment circuit, coupled to the second quartz crystal resonators, receives the second oscillating signal and adjusts the second oscillating signal to generate a first waveform adjustment signal.

Abstract: An oscillating device includes a first quartz crystal resonator, a driving circuit, a first buffer, an attenuator, a second quartz crystal resonator, and a second buffer. The first quartz crystal resonator and the second quartz crystal resonator respectively have a first resonant frequency and a second resonant frequency. The driving circuit drives the first quartz crystal resonator to generate a first oscillating signal having the first resonant frequency. The first buffer generates a first clock signal in response to the first oscillating signal. The attenuator reduces the wave swing of the first clock signal to generate an attenuated signal. The second quartz crystal resonator rectifies the attenuated signal to generate a second oscillating signal having the second resonant frequency. The second buffer generates a second clock signal in response to the second oscillating signal.

Abstract: A method of room based position determination for a mobile node in a positioning system is disclosed. The method comprises determining a room in an area deployed with at least a reference node of the positioning system, collecting a plurality of RSSI data from the at least a reference node in every place of the room, establishing a room fingerprint, performing a real-time RSSI measurement on the at least a reference node, to collect a plurality of real-time RSSI data from the at least a reference node, and determining whether the mobile node is within the room according to the RSSI mean parameter, the maximum distance parameter of the room fingerprint database and the collected real-time RSSI data from the at least a reference node.

Abstract: A method of position and motion detection with packet communication for a first radio node of a wireless communication system is disclosed. The method comprises periodically receiving at least a data packet from at least a second radio node of the wireless communication system, wherein the data packet includes an identity corresponding to the second radio node, measuring a RF power of the received data packet, establishing a detection table including the periodically measured RF powers and the corresponding identity of the received data packet, and determining an object is moving between the first radio node and the second radio node when detecting a RF power change between the currently measured RF power and the previously measured RF power according to the detection table.

Abstract: A method of room based position determination for a mobile node in a positioning system is disclosed. The method comprises determining a room in an area deployed with at least a reference node of the positioning system, collecting a plurality of RSSI data from the at least a reference node in every place of the room, establishing a room fingerprint, performing a real-time RSSI measurement on the at least a reference node, to collect a plurality of real-time RSSI data from the at least a reference node, and determining whether the mobile node is within the room according to the RSSI mean parameter, the maximum distance parameter of the room fingerprint database and the collected real-time RSSI data from the at least a reference node.

Abstract: A method of performing a timing arrangement for a first radio node of a mesh network is disclosed. The method comprises broadcasting a synchronization packet including an information element for indicating a starting time and an ending time of an active period and a length of an interval, wherein the first node monitors a physical channel for data transmission and reception only in the active period of the interval, whereby other nodes of the mesh network receiving the synchronization packet comply with the time schedule indicated in the synchronization packet.

Abstract: A waterproof electronic device that is waterproof and has pressure-equilibrium functions is provided. The waterproof electronic device includes a housing, a microphone, an elastic element, and a waterproof element. The housing has a chamber and an acoustic hole communicating with the chamber. The microphone is disposed in the chamber. The elastic element is disposed on the microphone. The elastic element includes a through hole facing the microphone, and a ventilation groove communicating with the through hole. The waterproof element is connected to the elastic element and the housing, and is configured to block liquid. The waterproof element includes pores communicating with the acoustic hole and the through hole.

Abstract: A wearable device includes a nonconductive base, a metal loop, and a matching circuit. The nonconductive base substantially has a hollow structure. The metal loop is disposed on the nonconductive base, and has a feeding point and a grounding point. The metal loop has at least one notch. The grounding point of the metal loop is coupled through the matching circuit to a ground voltage. An antenna structure of the wearable device is formed by the metal loop and the matching circuit.

Abstract: A wearable electronic device includes a main body, a watchband spring pin engaged with one side of the main body, and a wrist-worn watchband connected to the watchband spring pin. The main body includes a wireless communication module and a conductive member electrically connected to the wireless communication module. The watchband spring pin is physically connected to the conductive member on the main body to be an antenna unit of the wireless communication module.

Abstract: An electronic product and its cable set are provided in which the cable set includes a cable assembly and a connector. The connector includes a single magnet block, a metal unit and two conductive ends. The metal unit is fixed and contacted with outer surfaces of the single magnet block, and is electrically connected to the cable assembly for attracting and electrically connecting to a portable electronic device. The conductive ends respectively penetrate through the single magnet block and electrically connect to the cable assembly for electrically connecting to the portable electronic device.

Abstract: A wearable device includes a nonconductive base, a metal loop, and a matching circuit. The nonconductive base substantially has a hollow structure. The metal loop is disposed on the nonconductive base, and has a feeding point and a grounding point. The metal loop has at least one notch. The grounding point of the metal loop is coupled through the matching circuit to a ground voltage. An antenna structure of the wearable device is formed by the metal loop and the matching circuit.

Abstract: An electronic product and its cable set are provided in which the cable set includes a cable assembly and a connector. The connector includes a single magnet block, a metal unit and two conductive ends. The metal unit is fixed and contacted with outer surfaces of the single magnet block, and is electrically connected to the cable assembly for attracting and electrically connecting to a portable electronic device. The conductive ends respectively penetrate through the single magnet block and electrically connect to the cable assembly for electrically connecting to the portable electronic device.

Abstract: A wearable electronic device includes a main body, a watchband spring pin engaged with one side of the main body, and a wrist-worn watchband connected to the watchband spring pin. The main body includes a wireless communication module and a conductive member electrically connected to the wireless communication module. The watchband spring pin is physically connected to the conductive member on the main body to be an antenna unit of the wireless communication module.

Abstract: A method for fabricating one-dimensional metallic nanostructures comprises steps: sputtering a conductive film on a flexible substrate to form a conductive substrate; placing the conductive substrate in an electrolytic solution, and undertaking electrochemical deposition to form one-dimensional metallic nanostructures corresponding to the conductive film on the conductive substrate. The method fabricates high-surface-area one-dimensional metallic nanostructures on a flexible substrate, exempted from the high price of the photolithographic method, the complicated process of the hard template method, the varied characteristic and non-uniform coating of the seed-mediated growth method.