Patent application number | Description | Published |
20090289609 | POWER SUPPLY, TESTER, AND STABILIZER - Provided is a power supply apparatus including a low pass filter that receives an output voltage of a current output section and allows a low frequency component with a frequency lower than a preset cutoff frequency to pass through; an excess voltage restricting load section that consumes an excess voltage restricting current, which is at least a portion of the output current from the current output section, when a load is turned on; and an excess voltage restricting control section that keeps the excess voltage restricting load section turned off when the output voltage of the current output section is less than an upper reference voltage, which is obtained by adding together a voltage output by the low pass filter and a preset upper offset voltage. | 11-26-2009 |
20110012622 | TEST APPARATUS - Provided is a test apparatus that tests a device under test, comprising a power supply that generates supply power supplied to the device under test; a transmission path that transmits the supply power generated by the power supply to the device under test; a high-capacitance capacitor that is provided between the transmission path and a ground potential; a low-capacitance capacitor that has a lower capacitance than the high-capacitance capacitor and that is provided between the transmission path and the ground potential at a position closer to the device under test than the high-capacitance capacitor is to the device under test; an intermediate capacitor that is provided between the transmission path and the ground potential at a position between the high-capacitance capacitor and the low-capacitance capacitor; and a current measuring section that measures current flowing through the transmission path between the intermediate capacitor and the low-capacitance capacitor. | 01-20-2011 |
20110018549 | TEST APPARATUS, ADDITIONAL CIRCUIT AND TEST BOARD - Provided is a test apparatus that tests a device under test, comprising a power supply that generates power supplied to the device under test; a transmission path that transmits the power generated by the power supply to the device under test; a current measuring section that measures a peak in current supplied to the device under test via the transmission path, the peak including a frequency component higher than a frequency corresponding to a product of an inductance component from the power supply to the device under test and a capacitance component between the transmission path and a ground potential; and a judging section that judges acceptability of the device under test based on the peak measured by the current measuring section. | 01-27-2011 |
20110018559 | TEST APPARATUS - Provided is a test apparatus that tests a device under test, comprising a power supply that generates supply power supplied to the device under test; a transmission path that transmits the supply power generated by the power supply to the device under test; an intermediate capacitor that is provided between the transmission path and a ground potential; a power supply current measuring section that measures a current flowing through the transmission path at a position closer to the power supply than the intermediate capacitor; a charge and discharge current measuring section that measures a charge and discharge current of the intermediate capacitor; and a load current calculating section that calculates a load current flowing through the device under test based on a sum of the current measured by the power supply current measuring section and the current measured by the charge and discharge current measuring section. | 01-27-2011 |
20110031984 | TEST APPARATUS - Provided is a test apparatus that tests a device under test, comprising a power supply that generates power supplied to the device under test; a transmission path that transmits the power generated by the power supply to the device under test; a current measuring section that measures a digital waveform of load current supplied to the device under test via the transmission path, the digital waveform including a frequency component higher than a frequency corresponding to a product of an inductance component of the power supply and a capacitance component between the transmission path and a ground potential; and a judging section that judges acceptability of the device under test based on the digital waveform of the load current measured by the current measuring section. | 02-10-2011 |
20110169500 | TEST APPARATUS, ADDITIONAL CIRCUIT AND TEST BOARD - Provided is a test apparatus that tests a device under test, comprising a power supply that generates power supplied to the device under test; a transmission path that transmits the power generated by the power supply to the device under test; an intermediate capacitor that is provided between the transmission path and a ground potential; a charge/discharge current measuring section that measures charge/discharge current of the intermediate capacitor; and a load current calculating section that calculates a load current flowing through the device under test, based on the current measured by the charge/discharge current measuring section. | 07-14-2011 |
Patent application number | Description | Published |
20080319928 | Method, computer, and recording medium storing a program for computing an optimal solution to engine design variables - A method, computer, and recording medium storing a program are provided which, based on local optimal solutions, more efficiently calculate an optimal global optimal solution in a global operating area. System calculates the global optimal solution by solving, using a genetic algorithm based on the local optimal solutions and the initial values, an equation, which should be satisfied by the plurality of design variables, by obtaining the plurality of combinations of design variables composing local optimal solutions for each design variable respectively calculated for each of a plurality of combinations of a plurality of operating states, and by obtaining initial values for the plurality of combinations of design variables used for calculating the global optimal solution. | 12-25-2008 |
20090222245 | Method, computer, and recording medium storing a program for computing engine design variables - For a plurality of combinations of a plurality of operating states included in an operating range of an engine and for a plurality of combinations of a plurality of objective variables, a system, which calculates design variables, includes a calculating device for obtaining global optimal solutions of the design variables that minimize or maximize a sum of the plurality of objective variables, which respectively correspond to the plurality of combinations of the plurality of operating states; a receiving device for receiving designation of an upper limit or a lower limit of the plurality of objective variables; and a searching device for searching for global optimal solutions that result in the smoothest change in the design variables when changing the operating states in a range of the received upper limit to the received lower limit of the objective variables, with one of the global optimal solutions as an initial value set. | 09-03-2009 |
Patent application number | Description | Published |
20090021239 | CURRENT MEASURING APPARATUS, TEST APPARTAUS, CURRENT MEASURING METHOD AND TEST METHOD - There is provided a current measuring apparatus that measures an electric current received by an electronic device from an input terminal, The current measuring apparatus includes a first voltage accumulator that accumulates a reference supply voltage that acts as a reference for a voltage being supplied to the electronic device during measuring electric currents, a first switch that connects a power supply to the first voltage accumulator to accumulate the reference supply voltage before measuring electric currents and disconnects the power supply from the first voltage accumulator during measuring electric currents, a current supplying section that supplies an electric current based on the reference supply voltage accumulated in the first voltage accumulator and a terminal voltage of the input terminal to the electronic device during measuring electric currents, and a first current measuring section that measures the supply current supplied to the electronic device. | 01-22-2009 |
20090121725 | TEST APPARATUS AND MEASUREMENT APPARATUS - There is provided a test apparatus for testing a device under test, which includes a voltage supplying section which supplies a voltage to the device under test through a wire, a first capacitor which is arranged between the wire and a common potential in series, a current detecting section which detects a current flowing through the wire at a location closer to the device under test than the first capacitor is, an integrating section which outputs an integration value obtained by integrating a difference between the current detected by the current detecting section and a predetermined reference current, and a judging section which judges whether the device under test is a pass or a failure based on the integration value. | 05-14-2009 |
20090121726 | TEST APPARATUS AND MEASUREMENT APPARATUS - There is provided a test apparatus for testing a device under test, which includes a voltage supplying section that supplies a voltage to the device under test through a wire, a first capacitor that is arranged between the wire and a common potential in series, a current detecting section that detects a current flowing through the wire at a location closer to the device under test than the first capacitor is, an integrating section that outputs an integration value obtained by integrating a difference between the current detected by the current detecting section and a predetermined reference current, and a judging section that judges whether the device under test is a pass or a failure based on the integration value. | 05-14-2009 |
20130122411 | DEVELOPER, DEVELOPER CONTAINER, IMAGE FORMATION UNIT, AND IMAGE FORMATION APPARATUS - A developer includes a toner containing at least a binder resin, wherein the toner has a molecular weight distribution Mz/Mw of 2.0 or smaller and a phase angle of viscoelasticity of 65° or greater. | 05-16-2013 |