摘要:
Volume adjustment is performed in small steps at a DSP (12) and volume adjustment is performed in wide steps at electronic volume circuits (18L, 18R). Adjustment only by the DSP (12) is performed for a small volume range less than or equal to a predetermined level. For a volume higher than or equal to the predetermined level, fine adjustment by the DSP (12) at the transient period of volume adjustment is combined to reduce the increment of variation so that the volume adjustment is performed gradually.
摘要:
A challenge to be met by the present invention is to provide an electronic component mounting apparatus and an electronic component mounting method that enable a reduction in the frequency of operation required with switching of a component type, to thus enhance productivity.In component mount operation for taking chips of component types A, B, and C out of a component supply portion by means of a single mount head and mounting the chips on two substrates held by a first lane and a second lane, when a subsequently-carried-in subsequent substrate has come to be able to undergo component mount operation before completion of processing pertaining to a preceding substrate mount process in which component mount operation is carried out on a previously-carried-in preceding substrate among a plurality of substrates, processing pertaining to a subsequent substrate mount process is started by taking, as mount start components, chips already serving as targets of component mount operation for the preceding substrate at this timing, and processing pertaining to the preceding substrate mount process during which mounting is not yet completed is continually carried out. Thereby, the frequency of operation required with switching of a component type, such as replacement of a nozzle, can be reduced.
摘要:
An aspect of the invention provides a motor that comprises: a stator including multiple motor coils; multiple bus rings configured to distribute currents of different phases to the motor coils; and a ring-shaped bus ring holder in which multiple holding grooves configured to hold the respective bus rings are formed, wherein: each of the motor coils includes an insulator around which a wound wire is wound; the insulator includes an outer flange formed at an outer side of the wound wire in a radial direction of the motor and extending in an axial direction of the motor; and the bus ring holder is arranged at an outer side of the outer flange in the radial direction of the motor, and contiguous to the outer flange.
摘要:
The present invention provides a polycrystalline silicon conducting structure (e.g., a resistor) whose resistance value is controlled, and can be less variable and less dependent on temperature with respect to any resistant value, and a process of producing the same. Use is made of at least a two-layer structure including a first polycrystalline silicon layer of large crystal grain size and a second polycrystalline silicon layer of small crystal grain size, and the first polycrystalline silicon layer has a positive temperature dependence of resistance while the second polycrystalline layer has a negative temperature dependence of resistance, or vice versa. Moreover, the polycrystalline silicon layer of large grain size can be formed by high dose ion implantation and annealing, or by depositing the layers by chemical vapor deposition at different temperatures so as to form large-grain and small-grain layers.
摘要:
A method of manufacturing an improved bipolar transistor or BiCMOS having a phosphorus-doped polysilicon emitter electrode is disclosed. The method comprises forming an emitter electrode wherein a phosphorus-doped amorphous silicon film is deposited at temperature not higher than 540.degree. C. and then subjected to low temperature annealing treatment at a temperature of 600.degree. C. to 750.degree. C., under which the amorphous silicon is converted to a polysilicon and the phosphorus present in the amorphous silicon film is diffused into a base region to form an emitter region, followed by high temperature/short time annealing treatment at a temperature of 900.degree. C. to 950.degree. C. so that an activation rate of an impurity in a boron-doped polysilicon base electrode or source-drain regions of MOS.cndot.FET is improved.
摘要:
Inputted digital data are held in a data register and converted to multi-state analog amount by a resistance dividing circuit and a decoder. A comparator compares an analog amount read from a non-volatile memory cell with a converted analog amount; and in accordance with this comparison result, a writing voltage is supplied to a memory cell. A first bias generating circuit is provided for generating two different types of bias voltages as this writing voltage, MOS transistors are inserted as respective switches to the bias voltage supply lines and writing voltages are switched by selectively ON/OFF-controlling one of the MOS transistors in accordance with the upper bit of the inputted digital data. As a result, unnecessary writing time can be eliminated, time required for executing writing can be reduced and circuit configuration can be simplified.
摘要:
A molded motor includes an annular stator formed by molding coils in resin, a rotor disposed in an internal space which is formed radially inside the stator, a cover covering the internal space, and an elastic member sandwiched between the cover and the stator and located at a more inner side in the radial direction of the stator from the coils.
摘要:
An inverter type AC generator includes an inverter circuit converting a DC output into AC output of a predetermined frequency and supplying the AC output to a load via a load line in order to improve the quality of an AC output waveform at least in parallel operations. The inverter AC generator includes a zero-crossing detection circuit for detecting a timing of zero-crossings of an AC output voltage waveform on the output line. A controller generates a drive signal in synchronization with the timing of the detected zero-crossings, when a predetermined number of zero-crossings have been detected, and drives the inverter to perform a synchronized operation process.
摘要:
Included are a rotor, and a stator having a yoke section and a teeth section including multiple teeth. The teeth section and the yoke section are made of mutually independent configuration members, and connected to each other. At least one of the teeth section and the yoke section is formed by connecting each neighboring two of its multiple segments arranged one after another in a direction in which the rotor rotates. At least some neighboring teeth out of the multiple teeth are unified.
摘要:
The present invention provides a polycrystalline silicon conducting structure (e.g., a resistor) whose resistance value is controlled, and can be less variable and less dependent on temperature with respect to any resistant value, and a process of producing the same. Use is made of at least a two-layer structure including a first polycrystalline silicon layer of large crystal grain size and a second polycrystalline silicon layer of small crystal grain size, and the first polycrystalline silicon layer has a positive temperature dependence of resistance while the second polycrystalline silicon layer has a negative temperature dependence of resistance, or vice versa. Moreover, the polycrystalline silicon layer of large grain size can be formed by high dose ion implantation and annealing, or by depositing the layers by chemical vapor deposition at different temperatures so as to form large-grain and small-grain layers.