摘要:
An n-type AlGaAs cladding layer of a first semiconductor laser 39 to be first formed on an n-type GaAs buffer layer 22 is constructed of a two-layer structure of a second n-type AlxGa1-xAs (x=0.500) cladding layer 23 and a first n-type AlxGa1-xAs (x=0.425) cladding layer 24. With this arrangement, in removing by etching the second n-type cladding layer 23 located on the n-type GaAs buffer layer 22 side with HF, no cloudiness occurs since the Al crystal mixture ratio x of the second n-type cladding layer 23 is 0.500, allowing mirror surface etching to be achieved. Moreover, by virtue of selectivity to GaAs, the etching automatically stops in the n-type GaAs buffer layer 22. Even in the above case, ellipticity can be improved by matching the vertical radiation angle θ⊥ to 36 degrees since the Al crystal mixture ratio x of the first n-type cladding layer 24 located on the AlGaAs multi-quantum well active layer 25 side is 0.425.
摘要翻译:首先形成在n型GaAs缓冲层22上的第一半导体激光器39的n型AlGaAs覆层由第二n型Al x Ga 1-x As(x = 0.500)包层的两层结构构成 23和第一n型Al x Ga 1-x As(x = 0.425)包覆层24.通过这种布置,通过用HF除去位于n型GaAs缓冲层22侧的第二n型包覆层23, 由于第二n型包覆层23的Al晶体混合比x为0.500,因此发生混浊,从而能够实现镜面蚀刻。 此外,由于对GaAs的选择性,在n型GaAs缓冲层22中蚀刻自动停止。即使在上述情况下,通过将垂直辐射角θ⊥与36度匹配可以提高椭圆率,因为Al晶体混合比 位于AlGaAs多量子阱有源层25一侧的第一n型覆层24的x为0.425。
摘要:
In a control device for an automatic transmission which holds a line pressure solenoid of an automatic transmission in a stationary ON state while an engine is in a stop state, when a key switch is switched ON, "stationary ON control device" supplies a high voltage to the line pressure solenoid for a short time so as to over-excite it, and a holding magnetization of the line pressure solenoid is then maintained by a low voltage. Subsequently, if it is determined by engine rotation speed detection device that a cell motor is being driven, ordinary control is performed wherein an over-excitation, holding magnetization and OFF cycle is repeated. Further, when a battery voltage drops while the cell motor is being driven so that the line pressure solenoid with holding magnetization switches OFF, recovery device rapidly restores the solenoid to the normal stationary ON state by performing intermittent over-excitation.
摘要:
A communications device for a control device is provided which includes a signal line communicating with the control device, and a transmitter that transmits a pulse signal including digital information to the control device through the signal line. The transmitter varies a duty ratio of the pulse signal so that the duty ratio corresponds to the logical value 1/0 of the digital information. The control device reads a binary signal from the signal line at a predetermined frequency based on a first processing program, and processes the binary signal according to the first processing program. The control device detects passage of a leading edge of the pulse signal from a change in the received binary signal, and reproduces the digital information based on the binary signal read at a time when a first predetermined time elapses after the passage of the leading edge of the pulse signal is detected. The first predetermined time is set to be intermediate between the varied duty ratios. The control device detects an abnormality in the communication by detecting that at least one of the rise and fall of the binary signal disappears.
摘要:
A control system for an automatic power transmission monitors atmospheric pressure and a throttle valve open angle. The system corrects the monitored throttle valve open angle on the basis of the monitored atmospheric pressure so as to compensate for a drop of engine output torque due to lowering of the atmospheric pressure. The corrected throttle valve open angle is used for performing shift control and/or line pressure control.
摘要:
A strainer for paints or the like is proposed which comprises a main body portion and a filter plate portion, both carrying a filter cloth. When the filter plate portion is folded into the main body portion, there is left some space between the filter cloth on the former and that on the latter.
摘要:
An electronic-component-housing package comprises a container including a rectangular mount on which an electronic component is to be mounted and a sidewall surrounding the mount. The electronic-component-housing package comprises a lead terminal extending from an inside of a space enclosed by the sidewall to an outside of the space. A tip part of the lead terminal is extending along one side of the mount.
摘要:
A container includes a base body constituted of a side wall and a bottom portion, having a hollow or open portion for housing therein an electrical storage element, a conductive layer disposed at a bottom surface of the bottom portion facing the hollow or open portion, a first electrode electrically connected to the conductive layer and led out to an upper surface of the side wall of the base body, and a lid body having on its upper and lower surfaces electrically-connected second electrode and conductive portion. The lid body is bonded to the upper surface of the side wall of the base body to cover the hollow or open portion. The first electrode and the second electrode are substantially flush with each other, thus making it possible to provide a battery or an electric double layer capacitor which can be easily surface-mounted and exhibit an excellent circuit-board productivity.
摘要:
An engine compartment cooling fan provided in an engine compartment is controlled by a control unit, to be placed in its ON or OFF state, on the basis of an output from an engine compartment temperature sensor. The control unit continues the control of the engine compartment fan for a predetermined period of time after a key switch is turned off, with power supplied from a battery through a by-pass line. This permits the engine to be re-started without difficulty even after a short time of stop of the vehicle. Upon lapse of the predetermined time, the control unit disconnects the power supply through the by-pass line and stops its operation. Since there is no power consumption after the end of the operation of the cooling fan, unnecessary consumption of the battery can be avoided.