摘要:
The present invention relates to an optical mask at low cost and so on having a structure capable of reducing further a peak of beam intensity caused by diffraction. The optical mask is constructed by overlapping a first mask and a second mask. The first mask and second mask each are a serrated aperture mask. The schematic shapes of the respective apertures of the first mask and second mask are almost rectangular and identical to each other. The fringe defining the aperture of the first mask is machined in a serrated shape, and the fringe defining the aperture of the second mask also is machined in a serrated shape. In the optical mask, the first mask and second mask are overlapped so that the serrations of the fringes defining the respective apertures of the first mask and second mask are located alternately.
摘要:
A method of manufacturing a sliding part includes: an injection molding step of injection-molding a compacted member of a molding compound which is a mixture of powder material equivalent to SUS440C, graphite carbon corresponding to an oxygen content of the material, and a binder; a degreasing step of heating the compacted member thus obtained by the injection molding step under a neutral atmospheric condition to remove substantially all of the binder from the compacted member; and a baking step of heating the compacted member which is degreased under a vacuum condition of 0.1333 Pa or less from a room temperature up to 1000° C. to reduce an oxygen content of the compacted member to 0.02% or less by the reaction of C+O→CO, and then heating the compacted member under an argon atmospheric condition of 133.3 to 3999 Pa for two hours after the temperature is increased up to 1250° C.
摘要:
A spray distribution measuring device comprises a chamber 4 having a spray nozzle 1 as a measurement object at the top; a saucer 3 arranged below the spray nozzle within the chamber 4 and partitioned into a plurality of regions each having a prescribed area; measuring tubes 6 each installed substantially vertically from each region of the saucer 3 and having a prescribed sectional area, the upper end of each of which opens into the bottom of each region of the saucer; pressure sensors 7 each installed at the lower end of each of the measuring tubes to measure the head pressure of each measuring tube; and a controller 10 for computing a difference between the pressure applied to the pressure sensor and an initial pressure, and measures the spray distribution on the basis of a difference between the head pressure of the a test solution accumulated in each measuring tube by spraying and the initial pressure before the spraying.
摘要:
An A/D converter includes a sample-hold circuit, A/D converting stages connected in series to the sample-hold circuit, and an encoder/latch circuit which adds 3-bit digital signals issued from the A/D converting stages to each other for outputting a signal of 9 bits. The sample-hold circuit and the A/D converting stages each include a differential amplifier. Differential outputs of each differential amplifier are short-circuited for a predetermined initial period in each sampling period.
摘要:
In a pipeline type A/D converter, a sample/hold.cndot.subtracter circuit of an A/D converter block of a first stage samples an analog voltage and outputs an offset voltage at a first phase, and subtracts an output voltage of an A/D converter from the sampled analog voltage in a second phase. An A/D converter of an A/D converter block of a succeeding stage subtracts the output voltage of the sample/hold.cndot.subtracter circuit of the first phase from the output voltage of the sample hold.cndot.subtracter circuit of the second phase, and converts the subtracted result into a digital code. The influence of an offset of a differential amplifier included in the sample/hold.cndot.subtracter circuit is removed so that A/D conversion of high accuracy is allowed.
摘要:
A high-performance differential latch circuit which includes a differential amplifier circuit comprised of an NMOS transistor (27) serving as a constant current source, PMOS transistors (3, 4) and NMOS transistors (23,24), a latch circuit comprised of NMOS transistors (25, 26), and a switch circuit comprised of NMOS transistors (21,22,28) for alternately operating the differential amplifying function and latch function, the transistor (27) serving as the constant current source having a drain terminal directly connected to the transistors (23,24) and a source terminal directly connected to a ground voltage (2), whereby the differential latch circuit differentially amplifies the signals without the loss of the constant current source function during the differential amplification.
摘要:
An idling speed control valve for an internal combustion engine is disposed bypassing a throttle valve arranged at an intake passage of the engine, and proportionally controls the quantity of air flowing in the bypass passage based on an output of an electronic control unit including an idling revolution number control function. The valve is controlled by an electromagnetic coil of a solenoid device, and the coil is made of a brass series alloy wire material.
摘要:
An idle position detection switch, in which a fixed contact, a terminal for transmitting an idle position signal to an external terminal, and a support disc firmly attaching both the fixed contact and the terminal are insert-molded into a connector made of a resin. As a result of the construction, not only the switch can be fabricated with less components and less cost, but also each contact portion has such an improved rigidity as to allow the incidence of false contacts to be reduced.
摘要:
A potential detecting circuit comprises a first MOS transistor of a first conductivity type whose drain receives an input potential that is equal to or lower, in absolute value, than a second potential whose absolute value is higher than that of a first potential, a second MOS transistor of a second conductivity type whose source is connected to the source of the first transistor and gate receives the first potential, a third MOS transistor of the first conductivity type whose source is connected to the second MOS transistor, source receives a reference potential whose absolute value is lower than that of the first potential, and gate receives the first potential, a detecting potential control block for applying to the first MOS transistor a potential varying in accordance with the input potential, and a potential detect output terminal for providing a detected potential, the potential detect output terminal being a junction between the drains of the second and third MOS transistors.
摘要:
Memory cells providing a memory cell array are each fromed of a floating gate MOS transistor for storing data and a select MOS transistor and the memory cell is connected to a power source via a MOS transistor providing a load element. A potential on the connection node A between the load element and the memory cell is detected by an inverter providing a potential detection circuit and a monitor output is derived from the inverter. A load providing MOS transistor having a source connected to the source of the MOS transistor providing the load element and a gate connected to the gate of the MOS transistor providing the load element is provided, a pad to which a control voltage is supplied is connected to the drain of the MOS transistor and the control voltage from the pad is applied to the gates of the MOS transistors to provide a current mirror circuit.