Patent application number | Description | Published |
20090121739 | AC DETECTING APPARATUS FOR DETECTING OPERATING STATES OF AC POWER SUPPLY - An exemplary AC detecting apparatus for detecting operating states of an AC power supply includes a detecting circuit connected to an AC power supply, the detecting circuit comprising a photocoupler having a luminous element with the anode connected to a live line of the AC power supply and the cathode connected to a neutral line of the AC power supply, and an optical receiving block with the cathode grounded and the anode connected to a first power source via a resistor; and a processor comprising an interrupt terminal connected to the anode of the optical receiving block, and an output terminal, wherein the detecting circuit detects the AC power supply to send a trigger signal to the processor for triggering a detecting program preinstalled in the processor to real-time analyze the operating states of the AC power supply, and outputs a result of the program via the output terminal. | 05-14-2009 |
20090121892 | NETWORK STATUS INDICATING CIRCUIT - A network status indicating circuit includes a logic circuit, a switch circuit, and an indicating unit. The logic circuit includes nine input ends, a NOT gate, and two OR gates. The switch circuit includes two input ends and two output ends. The indicating unit includes two LEDs. The logic circuit is connected to the indicating unit to indicate the status of a network IC. | 05-14-2009 |
20090134706 | REGULATED ALTERNATING CURRENT POWER SUPPLY - An exemplary regulated AC power supply comprising a three phase AC power source; a first switch having two input terminals arranged for receiving a first phase and a second phase of the three phase AC power source respectively, and an output terminal selectively connected to the input terminals for outputting a voltage of the first or the second phase; and a second switch having two input terminals arranged for receiving a third phase of the three phase AC power source and connected to the output terminal of the first switch respectively, and an output terminal selectively connected to the input terminals for outputting a voltages of the third phase or the voltage outputted by the first switch, wherein the first switch outputs the voltage of the first phase when it is provided, and the second switch outputs the voltage of the third phase when the it is provided. | 05-28-2009 |
20090157930 | MULTI-CHANNEL COMMUNICATION CIRCUIT - A multi-channel communication circuit includes a master device, a plurality of slave devices, and a multiplexer (MUX). A transmitting pin and a receiving pin of a serial interface of the master device are respectively connected to two data input pins of the MUX. Two control pins of the serial interface of the master device are connected to two selecting pins of the MUX. Four pins of the serial interface of the master device are connected to a power pin of the MUX. A transmitting pin and a receiving pin of a serial interface of each slave device are respectively connected to two data output pins of the MUX, the master device communicates with one slave device via transmitting a corresponding selecting signal to the two selecting pins of the MUX to select one slave device. | 06-18-2009 |
20090174261 | REDUNDANT POWER SUPPLY SYSTEM - An exemplary redundant power supply system includes a first power supply, a second power supply, a first sensor, a control circuit, and a relay switch. The control circuit includes a first input terminal connected to the first power supply via a first sensor to receive a status signal of the first power supply, a first NOT gate, a delay circuit connected to the first input terminal via the first NOT gate, a first output terminal sending a first control signal, and a second output terminal sending a second control signal. The relay switch configured to receive the two control signals from the two output terminals of the control circuit, and select the first power supply or the second power supply to supply power to an electronic device according to the two control signals. | 07-09-2009 |
20110221467 | AC POWER SUPPLY MEASURING CIRCUIT WITH VOLTAGE PROTECTING FUNCTION - An alternating current (AC) power supply measuring circuit includes a voltage dividing circuit, a measuring integrated circuit (IC), a control board, and a first power rectifying circuit. The voltage dividing circuit receives an AC voltage signal and divides the AC voltage signal to a first voltage dividing signal and a second voltage dividing signal. The measuring IC receives the first and second voltage dividing signals to obtain an AC voltage measuring signal. The control board receives the AC voltage measuring signal and processes the AC voltage measuring signal. The first power rectifying circuit provides a floating ground signal to the voltage dividing circuit. | 09-15-2011 |
20110228430 | POWER DISTRIBUTION UNIT - A power distribution unit includes a communication unit. The communication unit includes a communication port and a protection circuit. The communication unit includes a ground pin and a plurality of signal pins. The ground pin is connected to a digital ground of the power distribution unit. The signal pins are connected together to receive a voltage signal outputted by a hi-pot tester. The protection circuit includes a plurality of resistors connected between the signal pins and an analog ground of the power distribution unit. | 09-22-2011 |
20110242721 | ELECTRONIC DEVICE WITH SAFETY TESTING FUNCTION - An electronic device includes a lightning protection circuit, a DC power unit, a housing, and a safety test switching device. The lightning protection circuit includes a circuit board, a fire wire, a ground wire, an AC power unit, and at least two protection elements. Both the fire wire and the ground wire are coupled to the DC power unit and the AC power unit. The housing includes a bottom board. The circuit board is disposed on the bottom board. The safety test switching device includes a conduction block formed on the circuit board and a conductive plug. The conduction block defines a threaded hole. The conductive plug is detachably plugged into the conductive block, when the conductive plug is detached from the conductive block, the lightning protection circuit and the ground are an open circuit. | 10-06-2011 |
20110246795 | POWER SUPPLY SYTEM FOR COMPUTER - A power supply system for a computer, includes a power supply unit, a DC/DC converter circuit, memory, and a computer boot component. The power supply unit rectifies AC voltage into a first DC voltage. The DC/DC converter circuit is provided with the first DC voltage, and converts the first DC voltage into a plurality of usable DC voltages. The memory is provided with part of the plurality of usable DC voltages directly, and stores power on data which is capable of power on the computer. The computer boot component is provided with part of the plurality of usable DC voltages directly. The computer boot component is triggered to generate a power on signal to revive the power on data from the memory to power on the computer. | 10-06-2011 |
20110249418 | CHIP ADAPTER - A chip adapter used to install a chip on a first chip arranging area of a circuit board includes a board. The size of the board has the same size as the first chip arranging area of the circuit board. Edges of the chip adapter define a number of gaps corresponding to first pads of the circuit board. A second chip arranging area of the same size as the chip is arranged in a center of the chip adapter. A number of second pads are arranged around the second chip arranging area of the chip adapter corresponding to pins of the chip. Each second pad is electrically connected to a sidewall of the corresponding gap of the chip adapter. | 10-13-2011 |
20110254593 | POWER SUPPLY DRIVER CIRCUIT - A power supply driver circuit for providing power to an electronic device includes a switch module, a voltage regulator and a driver module. The switch module receives a control signal and turns on according to the control signal. The voltage regulator receives a first voltage and outputs a second voltage when the switch module turns on. The driver module provides power to the electronic device when the driver module receives the second voltage. | 10-20-2011 |
20110259672 | POINT-OF-SALE TERMINAL - A POS terminal comprises a controller, a main display, a sub-display, and a multimedia display. The controller comprises a casing including a top plate. The main display is disposed on the top plate. The sub-display is disposed on the top plate, and the display panel of the sub-display facing substantially back away from the display panel of the main display. | 10-27-2011 |
20110261545 | POWER DISTRIBUTION APPARATUS - A power distribution apparatus includes an outlet board, a fuse board, and at least one connector. The outlet board is connected to the fuse board through the at least one connector. | 10-27-2011 |
20110261974 | OUTPUT CIRCUIT FOR AUDIO CODEC CHIP - An output circuit for audio codec chip includes an audio amplifier chip and a noise eliminating circuit electrically connected to the audio codec chip and the audio amplifier chip. The audio amplifier chip receives audio signals form the audio codec chip and outputs amplified audio signals. The noise eliminating circuit includes a voltage detection circuit and a switch circuit; wherein when the voltage detection circuit detects a high voltage level power on/off signal in the audio signals received by the audio codec chip, the voltage detection circuit turns on the switch circuit. The audio amplifier chip is grounded via the switch circuit for eliminating interference of the noise signals. | 10-27-2011 |
20110273918 | POWER DEVICE - A power device includes two groups of diodes, a step-down circuit, and a capacitor. Each group of diodes includes a first diode and a second diode. An anode of the first diode is connected to a cathode of the second diode, a node between the first and second diode is connected to one of live lines and neutral lines of at least one alternating current source. The step-down circuit includes a first input terminal, a second input terminal, a first output terminal, and a second output terminal. The first and second input terminals are respectively connected to cathodes of the first diodes and anodes of the second diodes, the first and second output terminals are respectively connected to a power terminal and a ground terminal of a load. Two terminals of the capacitor are respectively connected to the first and second input terminals of the step-down circuit. | 11-10-2011 |
20110292552 | OVER-VOLTAGE PROTECTION DEVICE - An exemplary over-voltage protection device used in an electronic device includes a housing capable of being grounded, a circuit board, a connecting member detachably attached to the circuit board and the housing to electrically connect the circuit board with the housing, and a protection member connected to the circuit board and circuitry of the electronic device. When an over-voltage is generated in the electronic device, the over-voltage is transmitted to the ground through the protection member, the circuit board, the connecting member, and the housing. | 12-01-2011 |
20110292599 | SERVER ENCLOSURE AND CONNECTION ELEMENT THEREOF - A server enclosure includes a power input terminal to receive power signals, a number of connection elements, a number of lead terminals, and a number of power output terminals. Each connection element includes a connection portion and two fixing arms extending from opposite ends of the connection portion. The connection portion is engaged with the power input terminal to receive the power signals and output the power signals to the two fixing arms. Each lead terminal includes a first connection portion fixed to one fixing arm along an extending direction of the fixing arm to receive the power signals and a second connection portion to receive the power signals. Each power output terminal is connected to one of the second connection portions to receive the power signals. | 12-01-2011 |
20110299205 | VOLTAGE PROTECTING CIRCUIT FOR ELECTRONIC DEVICE - A voltage protecting circuit includes a switch unit, an upper limited voltage detecting unit, a lower limited voltage detecting unit, and a logic control unit. When a voltage output from a voltage input interface is less than the lower limited voltage or greater than the upper limited voltage, the logic control unit outputs a control signal to turn the switch unit off. The output voltage outputted from the voltage input interface is not provided to a working circuit. When the output voltage outputted from the voltage input interface is greater than the lower limited voltage and less than the upper limited voltage, the logic control unit outputs a control signal to turn the switch unit on. The output voltage output from the voltage input interface is provided to the working circuit. | 12-08-2011 |
20110299212 | RELAY DRIVE CIRCUIT - A relay drive circuit electrically connects to an alternating current power source for driving a relay includes a zero crossing test circuit, a logic control circuit, and a switch. The zero crossing test circuit is electrically connected to the alternating current power source and is for obtaining zero crossing regions of the alternating current power source and outputting a corresponding zero crossing detect signal. The logic control circuit is electrically connected to the zero crossing circuit and is capable of receiving the zero crossing detect signal and a corresponding switch control signal. The switch is electrically connected to the logic control circuit and the relay and is switched on or off in the zero crossing regions under the control of an output signal from the logic control circuit to corresponding control and power the relay on or off. | 12-08-2011 |