Class / Patent application number | Description | Number of patent applications / Date published |
324771000 | Power supply test | 25 |
20080218195 | POWER SUPPLY NOISE MEASURING CIRCUIT AND POWER SUPPLY NOISE MEASURING METHOD - A power supply noise measuring circuit and measuring method are provided which are capable of evaluating a frequency component of power supply noise that affects performance and functions in a circuit by using a cross-correlation function. The power supply noise measuring circuit includes a SIN wave generating circuit which generates a sine wave signal having a variable frequency in a constant amplitude, a cross-correlation processing circuit which calculates and output a cross-correlation function between power supply noise and a sine wave signal fed from the SIN wave generating circuit, a comparator which compares a cross-correlation function output with a specified threshold voltage and which generates an output when the cross-correlation function output exceeds the threshold voltage, and a counter which counts the number of occurrences of the output from the comparator within a specified time of period. | 09-11-2008 |
20080246507 | Body Capacitance Electric Field Powered Device For High Voltage Lines - Devices that couple to high voltage transmission lines obtain power themselves using the body capacitance of an element of the devices. The devices generate a comparatively lower voltage from the current flowing between the high voltage line and the element of the device that generates the body capacitance. The devices can be used to operate sensors that monitor the transmission lines or parameters of the power distribution system, such as current, line temperature, vibration, and the like. The devices can also be used as indicators, such as aircraft warning lights, information signs, etc. In addition, the devices can operate as RF transmission/reception or repeater devices, radar devices, mesh networking nodes, video/audio surveillance, sound emitting devices for scaring animals, drones that traverse the power line, etc. Because the devices operate in response to line voltage rather than current, the devices are reliable even in low current conditions. | 10-09-2008 |
20080246508 | METHOD TO DETERMINE AN OPERATING CHARACTERISTIC OF A VEHICLE POWER CONVERTER - Measured or otherwise known operating characteristics of a DC/DC power converter are used to determine, without measuring, an operating characteristic of the DC/DC power converter. | 10-09-2008 |
20080272798 | Display device and liquid crystal television - The present invention discloses enabling readily determining which circuit, among a plurality of circuits including an optical source lighting circuit and a power supply circuit, has a failure and repairing the circuits easily in a short period. A liquid crystal television | 11-06-2008 |
20090033356 | SYSTEM AND METHOD FOR ANALYZING END TO END TESTING - A system and method are provided for using a class H amplifier in a tester for testing protective relaying equipment, particularly useful in conducting end to end testing. The class H amplifier is configured to provide separation between the amplifier and the power supply of the tester using a DSP which also offers flexibility for programming algorithms to realize efficiencies in matching the waveform to the output rail. End to end testing is also improved by including expected results for the test case used by the tester to enable the tester to determine how close the results are to what is expected. This offers time savings and is less prone to error in that the expected results can be predetermined by a qualified/experienced professional. | 02-05-2009 |
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 |
20090179662 | System for Monitoring Individual Photovoltaic Modules - A system for monitoring the power output levels for each photovoltaic module of a solar array. The system connects individual photovoltaic module with its own voltage level sensing circuit, where the power output data is transferred through wired and wireless means to be efficiently analyzed. In addition to isolating high voltage DC power for safer information, the system enables technicians to quickly ascertain the productivity levels, potential problems, solutions and exact locations relating to each specific photovoltaic module within a solar array. | 07-16-2009 |
20090243646 | DETECTING CIRCUIT - A detecting circuit for detecting a battery having a first and second electrode, includes a contacting portion electrically connecting to the first electrode of the battery, a seesaw electrically connected to the second electrode of the battery, and an actuator electrically connecting to the second electrode of the battery. One end of the seesaw electrically contacts with the contacting portion when the battery have a protection circuit. The actuator is configured for providing power onto another end of the seesaw to separate the contacting portion with the seesaw when the battery has no a protection circuit. The detecting circuit can truly and handily judges whether the detected battery has the protection circuit according to the action of the seesaw | 10-01-2009 |
20090261855 | METHOD AND SYSTEM FOR INCORPORATING ELECTRONIC SIGNATURE ANALYSIS IN LOW VOLTAGE POWER SUPPLIES - A method and system for incorporating electronic signature analysis in a low voltage power supply in order to monitor current centrally. The electrical loads that are powered by the low voltage power supply can be tested individually via an automatic test routine by measuring and scaling of current through a differential amplifier. The current consumption of each electrical load can be measured by analyzing a “delta” in the current draw of each electrical load's ON and OFF condition. This value can be compared against a stored table of high and low limits for each electrical load. If a load's current is found to be outside the limits, it will be logged for an appropriate user to make repairs. A precision resistor (or other current sensing device) can be inserted in series with the output (or outputs) of the low voltage power supply, while in test mode, to allow the automatic test routine to run, and then be shorted out for normal operation. | 10-22-2009 |
20100007370 | APPARATUS, SYSTEM, AND METHOD FOR ERROR DETECTION IN A STAND ALONE POWER SUPPLY - An apparatus for error checking in a power supply includes a power module that determines that the power supply is in a self-test condition. The self-test condition involves the power supply being connected to an input power source while it is disconnected from the electronic load that it normally services. A load module connects an internal test load to the power supply when the power supply is in self-test condition, and an error checking module performs error check operations on the power supply while it is connected to the test load. The apparatus also includes a notify module that actuates an indicator when the error checking module determines that there are one or more faults in the power supply. The apparatus may also include a log module for storing error messages and reports in non-volatile memory. | 01-14-2010 |
20100085074 | POWER CONVERTER, SHORT DETECTION CIRCUIT THEREOF, AND METHOD FOR DETECTING SHORT - A short detection circuit, for detecting an output node corresponding to an output voltage converted from an input voltage of a power converter, includes a first current source, a charging/discharging unit, a comparator, and a logic control unit. The charging/discharging unit performs charging operation in accordance with the first current source to generate a charging signal in a shorted condition of the output node. The comparator outputs an enable signal by comparing the charging signal with a reference signal. The logic control unit is controlled by the enable signal to generate a fault signal for turning off a first switch coupled between the output node and the input voltage in the shorted condition of the output node. A method for detecting short of an output node corresponding to an output voltage converted from an input voltage of a power converter is also disclosed herein | 04-08-2010 |
20100109700 | ON-CHIP DETECTION OF POWER SUPPLY VULNERABILITIES - On-chip sensor to detect power supply vulnerabilities. The on-chip sensor employs a sensitive delay chain and an insensitive delay chain to detect power supply undershoots and overshoots without requiring external off-chip components. Undershoots and overshoots outside a user-defined threshold are detected. The undershoots and overshoots are indicated by a relative difference in phase of the two delay chains. The two delay chains are programmable to detect various frequencies. | 05-06-2010 |
20100164535 | SEMICONDUCTOR DEVICE AND SEMICONDUCTOR TESTING METHOD - Using a scan test system, a power supply wiring ( | 07-01-2010 |
20100176839 | POWER SUPPLY VOLTAGE MONITORING CIRCUIT AND ELECTRONIC CIRCUIT INCLUDING THE POWER SUPPLY VOLTAGE MONITORING CIRCUIT - Provided is a power supply voltage monitoring circuit ( | 07-15-2010 |
20100182036 | ELECTROSTATIC CHUCK POWER SUPPLY - A detection circuit is provided for a power supply for an electrostatic chuck generating a trapezoidal waveform with approximately flat tops and minimal dead-time between phase reversals. The detection circuit includes an amplifying circuit which receives inputs from a secondary winding of a transformer of the power supply and produces an amplified buffered signal. A chucking detect circuit receives the signal from the amplifying circuit and is configured to produce a first signal indicative of a substrate on the electrostatic chuck and a second signal indicative of an electrostatic chuck without a substrate. A chucking quality circuit receives the signal from the amplifying circuit and produces a signal indicative of a quality of the chucking of the substrate. A movement detection circuit receives the signal from the amplifying circuit and produces a signal indicative of movement of the substrate on the electrostatic chuck. | 07-22-2010 |
20100194424 | HYBRID LOAD SYSTEMS INCLUDING A DYNAMIC ELECTRONIC LOAD AND PASSIVE RESISTIVE LOAD MODULES - A hybrid load system includes a dynamic electronic load module, and a plurality of passive resistive modules coupled with the dynamic electronic load module. The hybrid system includes a control system in communication with the dynamic electronic load module and the passive resistive modules for determining when and how many of the passive resistive modules should be applied in parallel with the dynamic electronic load module for creating a desired load. | 08-05-2010 |
20100194425 | METHOD AND APPARATUS FOR TESTING AN ALTERNATING CURRENT POWER SOURCE FOR DEFIBRILLATION COMPATIBILITY - A device tests a circuit that is a source of alternating current by measuring at least one electrical parameter of the circuit to determine whether the circuit is able to provide adequate energy for defibrillation by an external defibrillator. The device may test the circuit by applying a load to the circuit, and measuring one or more electrical parameters when the load is applied to the circuit. The device may be the external defibrillator itself, or a separate testing device. In some embodiments in which an external defibrillator tests a circuit, the defibrillator modifies a value of at least one therapy delivery parameter for a subsequent delivery of one or more defibrillation pulses based on the measured electrical parameter value measured. By modifying a therapy delivery parameter, the defibrillator may deliver defibrillation pulses at an energy level that is supportable by the circuit. | 08-05-2010 |
20100194426 | METHOD OF TESTING A POWER SUPPLY CONTROLLER AND STRUCTURE THEREFOR - In one embodiment, a power supply controller is configured to operate in a test mode that facilitates measuring the value of an output signal of an error amplifier of the power supply controller. | 08-05-2010 |
20100207656 | DETECTION CIRCUIT AND A METHOD FOR DETECTING A WRONG SUPPLY VOLTAGE - The present invention relates to a detection circuit for detecting that a power supply unit is connected to a wrong supply voltage. Said detection circuit comprises a first voltage divider ( | 08-19-2010 |
20100237897 | OVERCURRENT DETECTING CIRCUIT AND POWER SUPPLY DEVICE - An overcurrent detecting circuit includes a comparison transistor, a constant current source circuit, and a comparison circuit. The comparison transistor includes a gate and a drain respectively connected to a gate and a drain of a main transistor provided in a power circuit. The comparison transistor is used for comparison with the main transistor when a voltage higher than a power supply voltage is applied to the gate of the main transistor and the gate of the comparison transistor during the operation of the power circuit. The constant current source circuit generates a constant current and supplies the constant current to the comparison transistor. The comparison circuit compares a source voltage of the comparison transistor with a source voltage of the main transistor and outputs a voltage indicating the comparison result. | 09-23-2010 |
20100237898 | OVERCURRENT DETECTING CIRCUIT AND POWER SUPPLY DEVICE - An overcurrent detecting circuit includes a comparison transistor, a constant current source circuit, a subtraction circuit, and a comparison circuit. The comparison transistor is used for comparison with a main transistor provided in the power circuit. The constant current source circuit supplies a constant current to the comparison transistor. The subtraction circuit subtracts a voltage corresponding to a power supply voltage from a voltage between a drain and a source of the comparison transistor and outputs a voltage indicating the subtraction result. The comparison circuit compares the voltage output from the subtraction circuit with a voltage corresponding to a source voltage of the main transistor and outputs a voltage indicating the comparison result. | 09-23-2010 |
20100244885 | UNDER-VOLTAGE AND OVER-VOLTAGE DETECTION CIRCUIT AND DRIVING METHOD THEREOF - The present invention relates to a low-voltage and over-voltage detection circuit and a driving method thereof. | 09-30-2010 |
20100244886 | State Detection Device for Power Supply System - A state detection device for power supply system comprises: a measurement unit that obtains current, voltage, and temperature at a chargeable and dischargeable power storage unit as measurement values; a storage unit that stores property information of the power storage unit; an arithmetic unit that uses different methods to calculate first and second states of charge for the power storage unit based upon the measurement values and the property information; a conflict detection unit that detects a conflict in an event that a difference between the first state of charge and the second state of charge is equal to or greater than a predetermined threshold; and a correction unit that corrects the property information during charging or discharging of the power storage unit in response to the conflict having been detected by the conflict detection unit. | 09-30-2010 |
20100253382 | System and Method for Observing Threshold Voltage Variations - A system and method for observing threshold voltage variations are provided. A ring oscillator circuit comprises a plurality of inverters arranged in a sequential loop, a plurality of test circuits having devices under test, each coupled between a respective one of the inverters and a power supply. Each test circuit has a bypass field effect transistor (FET) having a first channel coupled between the power supply and a respective one of the inverters responsive to an individual enable signal, and a FET device under test having a second channel arranged in parallel to the first channel. A method is described for determining the threshold voltage of the device under test by disabling, for one of the inverters in the ring oscillator, the first FET device such that the device under test is coupled between the power supply and the respective inverter and affects the operating frequency of the ring oscillator. | 10-07-2010 |
20100295573 | METHOD OF INSPECTING POWER CONVERTER AND INSPECTING DEVICE - An inspecting ECU | 11-25-2010 |