摘要:
An exemplary motherboard includes a first slot arranged for mounting a first type of memory, a second slot arranged for mounting a second type of memory, a voltage regulator electronically connected to the first slot and the second slot, and a serial presence detect (SPD) unit connected to the voltage regulator. The first memory and the second memory alternatively mounted on the motherboard, the SPD detects which type of memory is mounted on the motherboard, and the voltage regulator outputs voltages suitable for the type of the memory mounted on the motherboard according to a detection result of the SPD.
摘要:
An exemplary printed circuit board includes a power plane, and a ground plane. The power plane includes two power modules, and an insulating medium for insulating the two power modules from each other. The ground plane is insulated from the power plane, a plurality of slots is defined in the ground plane and located close to facing edges of the two power modules, and the slots are arranged in rows along the facing edges of the two power modules.
摘要:
A printed circuit board includes a first ground layer and a second ground layer. The second ground layer is below the first ground layer. A signal transmission line is arranged on the printed circuit board. The first ground layer includes a chamber located below the transmission line. Therefore, the signal transmission line takes the second ground layer as a reference ground layer, so impedance of the signal transmission line is increased.
摘要:
A remote control system for home items includes: a radio frequency identification (RFID) system, including an RFID reader, an antenna, and one or more RFID tags, each of the RFID tags being for attachment to a respective home item and for collecting and storing information on a status of the home item, wherein when the RFID reader sends radio frequency signals via the antenna to activate any one or more of the RFID tags, one or more of the RFID tags transmits the stored information to the RFID reader via the antenna, and the RFID reader receives and processes the information; and a telecommunication network comprising a base station linked to the RFID reader, and one or more mobile communication devices, the mobile communication devices communicating with the RFID reader via the base station, and controlling the functions of the home items. A related remote control method is also provided.
摘要:
A transmission circuit for transmitting an IEEE 1394b signal includes a driving circuit, a load circuit connected to the driving circuit, a first signal line and a second signal line connected to the load circuit, an IEEE 1394b interface, a first resistor, a second resistor, and a third resistor. Two ends of the first resistor are separately connected between the first signal line and the second signal line. The second resistor is connected between one end of the first resistor and one terminal of the interface. The third resistor is connected between another end of the first resistor and another terminal of the interface. The third resistor is connected in series between the IEEE 1394b interface and the second signal line.
摘要:
A circuit topology for high-speed printed circuit board includes a driving circuit, and a number of receiving circuits. The driving circuit is mounted on the printed circuit board and coupled to a node via a transmission line. The receiving circuits receive signals transmitted from the driving circuit. Each receiving circuit is coupled to the node separately via a transmission line. Transmission line lengths between each of the receiving circuits and the node are substantially equal. The close the node is to the receiving circuits, the better the signal integrity. Using the circuit topology maintains signal integrity as the termination resistor does. It is of advantage that the circuit topology is simple to manufacture and very suitable for mass production.
摘要:
A cloud server and method controls one or more robots. The cloud server receives location information of each robot. A robot closest to a task location where a task is taken according to the location information. The cloud server of the data center sends a command to the located robot to move to the task location, where the command defines a task of the located robot to perform.
摘要:
Parameters of a radio frequency filter can be changed by changing structure of each component of the filter. Material of each component, diameters of each of magnetic cylinders, density of each of conductive coils, and thickness of each of dielectric layers can be changed. When any component needs to be replaced, the filter can be detached as needed.
摘要:
An exemplary guideway mechanism includes two branches, a group of connecting blocks, and a supporting bracket. The group of connecting blocks includes four connecting blocks arranged at four corners of an imaginary square and connecting the supporting bracket. Each branch includes two parallel rails. Adjacent ends of the rails of each branch respectively connect two adjacent connecting blocks.
摘要:
A simulation system for producing equivalent circuits reads data corresponding to a tabular W element format in a storage device, and adds data of the tabular W element format file using interpolation algorithm. A frequency-dependent transmission matrix is transformed into an N-port network matrix describing electrical properties of a multi-input and multi-output network. An N-port network matrix is transformed into a S-parameter matrix. A range of frequency of a s-parameter is determined and numbers of pole-residue, times for recursion and durable maximum system errors in the equivalent circuit is also determined. A vector fitting algorithm is performed and a rational function matrix composed with s-parameters is produced, to produce a general SPICE equivalent circuit based on the generated rational function matrix.