Abstract: The present invention provides a semiconductor evaluation apparatus. The semiconductor evaluation apparatus includes: a first integrated circuit; a second integrated circuit; a test section; a measurement section; and a computation section for determining whether a device is good or defective based on sets of power supply voltage and clock period.

Abstract: A method of and apparatus for determining a defect-free semiconductor integrated circuit, such as a CMOS IC. The method includes a measurement step of selecting a defect-free CMOS integrated circuit (IC) from a group of CMOS integrated circuits by measuring quiescent power supply current (QPSC), a step of successively inspecting a test IC and the reference defect-free IC for resemblance for QPSCs, and a comparison and determination step of determining resemblance between QPSC data so that when the resemblance is high, the first and second ICs are determined to be defect-free ICs, and when the resemblance is low, the first and second ICs are determined to be defective ICs. The apparatus performs at least those steps.

Abstract: A method of testing a CMOS integrated circuit including the steps of applying a test signal to a CMOS integrated circuit under test and measuring a quiescent power supply current at a plurality of strobe points, calculating defect current estimates corresponding to the strobe points based on average value ratios of the quiescent power supply currents at the plurality of strobe points calculated in advance for a good CMOS integrated circuit, measured values of the quiescent power supply current at the plurality of strobe points, and an average value of the measured values of the quiescent power supply currents, and judging the CMOS integrated circuit under test as a defect when an absolute value of a calculated defect current estimate is larger than an absolute value of an allowable error of a measured value of the quiescent power supply current, whereby it is possible to detect the defect current of a CMOS integrated circuit with a large quiescent power supply current and a large variation.

Abstract: A cutting tool is composed of a circular base plate, and a plurality of arc-shaped cutting tips fixed to the outer peripheral surface of the base plate and spaced from each other in a circumferential direction. The base plate is formed from stainless steel.

Abstract: A method and apparatus of determining a defect-free semiconductor integrated circuit such as CMOS IC able to determine a defect-free device regardless of the existence of a circuit leakage current, including a step of selecting defect-free CMOS integrated circuit from a group of CMOS integrated circuits a step of successively inspecting the test IC and reference defect-free IC for resemblance of features of quiescent power supply currents (QPSCs), and a step of determining if there is resemblance between the features test IC is defect-free.

Abstract: A vibrating compressor wherein an alternating voltage is applied from a d-c power source to a drive coil vibrating in a magnetic field via a d-c/a-c converter circuit is disclosed. An alternating voltage of a square wave form is applied to the drive coil of the vibrating compressor in such a manner as to avoid the timing at which a counter electromotive force generated in the drive coil intersects with zero level.

Abstract: A refrigerating device having an inverter circuit for generating alternating voltage, a vibrating compressor to which the alternating voltage from the inverter circuit is supplied, a condenser to which the refrigerant compressed by the compressor is supplied, a capillary tube provided on the downstream side of the condenser and an evaporator provided on the downstream side of the capillary tube, wherein a phase control circuit for controlling the phase of the alternating voltage supplied to the compressor in accordance with ambient temperature of the refrigerating device and/or the evaporator temperature is provided to cause the piston stroke of the vibrating compressor to be reduced in accordance with decreases in ambient temperature of the refrigerating device and/or the evaporator temperature so as to prevent unwanted damage to the compressor.

Abstract: An AC/DC power supply device for operating a refrigerator compressor by switching over the AC operation mode in which the compressor is operated from AC power source and the DC operation mode in which the compressor is operated from DC power source through an inverter circuit, wherein a thermostat is constructed so as to be connected to a circuit for supplying DC voltage to the inverter circuit in the DC operation mode, and a switching section is constructed so that high potential points including the potential of the AC power source and low potential points including the potential of the DC power source do not face each other in close vicinity to prevent the AC power voltage from being unwantedly applied to the low voltage side.

Abstract: A direct current power supply device for rectifying an a-c voltage of external power supply and supplying d-c power to a battery and/or a d-c load characterized in that it comprises a current detector to detect a current component flowing to the battery, a voltage detector to detect a terminal voltage of the battery, a control circuit controlled by the current detector and the voltage detector, a leakage transformer functioning by external a-c power supply, and a charging converter circuit for supplying d-c power to the battery, the charging converter circuit being controlled by the control circuit and supplied power from the output of the leakage transformer, the control circuit comprising a maximum value detecting circuit to combine output voltage of the circuit detector and the voltage detector, a switching circuit controlled by the maximum value detecting circuit, a pulse generating circuit in which pulse rise time controlled by the switching circuit and a switching control circuit controlled by the pulse

Abstract: An automotive power supply comprising a generator which produces a voltage when an engine is in operation, a main battery which drives a starter motor, an auxiliary battery which functions as a power source for direct current equipment in a vehicle, and a d-c voltage booster circuit which boosts the voltage produced in the generator to supply the auxiliary battery; wherein, in charging the main and auxiliary batteries in parallel by the voltage produced in the generator, the supply voltage to the auxiliary battery is boosted by compensating the line voltage drop between the generator and the auxiliary battery.

Abstract: An electrical vibration type compressor comprising a drive coil vibratably supported in a mechanical vibration system, a piston driven by the drive coil, at least one main semiconductor element with a control electrode which performs the switching control of a drive current to the drive coil, and a detecting means consisting of at least one detecting semiconductor element with a control electrode detecting the vibration of the drive coil to control the conduction and cutoff of the main semiconductor element with a control electrode and at least one timeconstant circuit; whereby the feedback transformer which has so far been used in a device of this type to supply a feedback current to the main semiconductor element with a control electrode is eliminated, and the switching operation is properly performed at the top and bottom dead centers of the piston.

Abstract: A process for the preparation of alcohols by oxidizing aliphatic saturated hydrocarbons, having 10-20 carbon atoms, in the presence of a boron compound, contacting the oxidation reaction mixture with water, removing the aqueous solution of boric acid, and separating the resulting oil layer with saponification and washing with water. A boron compound is added to the resulting oil layer to esterify the alcohols therein. The resulting mixture is distilled to remove unreacted hydrocarbons, the residue comprising borate esters of alcohols is contacted with water, the aqueous solution of boric acid is removed, and the resulting oil layer is separated and distilled to recover the desired alcohols.

Abstract: An improvement is provided in the manufacture of alkylene oxide adducts of an aliphatic alcohol in which the reaction mixture, comprising the alkylene oxide adduct, unreacted alcohol, acid catalyst residue, carbonyl compounds and hydrocarbons, is treated to remove unreacted alcohol for recycle to the adduct formation step. To prevent the build-up in the system of carbonyl compounds and hydrocarbons which are not easily distillable from the recycle alcohol because of their respective boiling points, at least a portion of the recycle alcohol is esterified with boric acid, the esterification mixture is subjected to distillation to remove volatile portions, and the borate ester thus obtained is hydrolyzed to recover the alcohol which is recycled to the adduct formation step.

Abstract: A process for the preparation of 5-nitro-1,4-naphthoquinone comprising nitrating 1,4-naphthoquinone under such a condition that the dehydrating value of sulfuric acid in the reaction mixture is at least 4 to selectively introduce a nitro group into the 5-position and pouring the reaction mixture into an aqueous medium to precipitate the product.

Abstract: An improvement is provided in the manufacture of alkylene oxide adducts of an aliphatic alcohol in which the reaction mixture, comprising the alkylene oxide adduct, unreacted alcohol, acid catalyst residue, carbonyl compounds and hydrocarbons, is treated to remove unreacted alcohol for recycle to the adduct formation step. To prevent the build-up in the system of carbonyl compounds and hydrocarbons which are not easily distillable from the recycle alcohol because of their respective boiling points, at least a portion of the recycle alcohol is esterified with boric acid, the esterification mixture is subjected to distillation to remove volatile portions, and the borate ester thus obtained is hydrolyzed to recover the alcohol which is recycled to the adduct formation step.