摘要:
There are provided a substrate for mounting a device and a package for housing the device employing the same in which a power semiconductor device can be readily set for a temperature suitable for operation and can thus function in a proper fashion.The substrate for mounting the device includes a support body having, on one main surface of the support body, a device mounting portion for mounting a power semiconductor device, the support body having a plurality of columnar parts that are spaced apart in a thickness direction with respect to the device mounting portion and are arranged apart from each other; and a heat accumulating region which is disposed between the columnar parts and is lower in thermal conductivity than the support body.
摘要:
A structure includes a circuit substrate including a first substrate and a second substrate. The first substrate has a region where an electronic component is to be mounted. The second substrate has a side surface connected to a first side surface of the first substrate. The structure further includes a frame on the circuit substrate, enclosing the region in a plane view. The frame crosses the boundary between the first substrate and the second substrate.
摘要:
A multi-carrier signal transmitter includes a multi-carrier modulation circuit, a power converter, a frequency converter and an interference protection determination circuit, and that the interference protection determination circuit determines a difference in power levels between a higher layer component and a lower layer component of multi-carrier signals in a manner to avoid digital interference. The power converter converts a power level of the multi-carrier signals when necessary based on a data of the determination, and the frequency converter converts a center frequency band of the multi-carrier signals when necessary based on the data of the determination. The digital interference of the hierarchical multi-carrier signals can be prevented.
摘要:
An electronic control system for an automotive vehicle includes communication portion provided between first and second control units and, specification information presenting portion arranged at the side of the first control unit for presenting specification information of the second control unit to the second control unit via the communication portion, specification information analyzing portion arranged at the side of the second control unit for analyzing the specification information, and control content setting portion arranged at the side of the second control unit for setting content of control depending upon the specification information on the basis of a result of analysis by the specification information analyzing portion. From the first control unit to the second control unit, the content of control of the second control unit is set depending upon the specification information by presenting the second control unit via the communication portion.
摘要:
An electronic component storing package which generates a large quantity of heat during operation and an electronic apparatus storing such an electronic component are provided. In the electronic component storing package and the electronic apparatus, a heat dissipating member (1) is used which comprising at least five layers including first metal layers (11) having good thermal conductivity and second metal layers (12) having a smaller coefficient of thermal expansion and less thickness compared with the first metal layers (11), the first metal layers (11) and second metal layers (12) being alternately stacked, the first metal layers uppermost and lowermost layers of the layers, a thickness of at least one internally-arranged first metal layer (11a) being thicker than that of the lowermost and uppermost layers. Accordingly, heat generated from the electronic component (5) can be dissipated well to the outside, and a coefficient of thermal expansion of a mounting portion (1a) can be brought close to that of the electronic component (5) or the like.
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.