Abstract: A vehicular electronic device has a semiconductor package and a multilayer wiring board. An electrode pad of the multilayer wiring board, to which a signal terminal of the semiconductor package is soldered, has a wiring pattern in an inner layer of the multilayer wiring board. A solder resist is applied and spaced from a periphery of the electrode pad to the exterior. The signal terminal is soldered to the electrode pad to cover an upper surface and an upper end of a side surface of the electrode pad. As a result, a crack is less likely to occur in solder connected to the signal terminal. Therefore, the signal terminal can be electrically connected with high reliability even when the signal terminal is provided in the semiconductor package with a small number.

Abstract: A vehicle navigation apparatus comprises: a recording medium reproduction portion that reproduces a recording medium to which image data and audio data are recorded; a CPU that performs a navigation function, processes the image data, and allows a display portion to display the image data; a sampling rate conversion IC that converts a sampling rate of the audio data; an encryption IC that encrypts the audio data; and an audio output portion that outputs the audio data outside the vehicle navigation apparatus. The recording medium reproduction portion outputs the audio data in two types of signal forms. The CPU performs a conversion process on the audio data having a lower data throughput, and outputs processed data to the encryption IC. The sampling rate conversion IC performs a sampling rate conversion process on the audio data having a higher data throughput, and outputs processed data to the encryption IC.

Abstract: A vehicular electronic device has a semiconductor package and a multilayer wiring board. An electrode pad of the multilayer wiring board, to which a signal terminal of the semiconductor package is soldered, has a wiring pattern in an inner layer of the multilayer wiring board. A solder resist is applied and spaced from a periphery of the electrode pad to the exterior. The signal terminal is soldered to the electrode pad to cover an upper surface and an upper end of a side surface of the electrode pad. As a result, a crack is less likely to occur in solder connected to the signal terminal. Therefore, the signal terminal can be electrically connected with high reliability even when the signal terminal is provided in the semiconductor package with a small number.

Abstract: A signal analysis device includes a synchronization data generation unit, a synchronization correction value calculation unit, and a correction unit. The synchronization unit outputs an A/D-converted correction signal as first synchronization data. The first synchronization data is associated with time based on the timing of a trigger signal input from the outside. The synchronization correction value calculation unit calculates, as a first synchronization correction value, an amplitude ratio, a phase difference, and a time difference between the first synchronization data and second synchronization data input from the outside on the basis of the first synchronization data and the second synchronization data. The correction unit corrects the amplitude, phase, and timing of the RF signal output from the object to be measured, on the basis of the first synchronization correction value or a second synchronization correction value input from the outside.

Abstract: The signal analysis device includes a synchronization data generation unit 19a that outputs an A/D-converted correction signal as first synchronization data which is associated with time based on the timing of a trigger signal input from the outside, a synchronization correction value calculation unit 19c that calculates, as a first synchronization correction value, an amplitude ratio, a phase difference, and a time difference between the first synchronization data and second synchronization data input from the outside on the basis of the first synchronization data and the second synchronization data, and a correction unit 19d that corrects the amplitude, phase, and timing of the RF signal output from the object to be measured, on the basis of the first synchronization correction value or a second synchronization correction value input from the outside.

Abstract: A silicone boot for a constant velocity universal joint includes a larger diameter portion attached to an outer joint member of a constant velocity universal joint, a smaller diameter portion attached to a shaft coupled with an inner joint member of the constant velocity universal joint, and a bellows portion, which is arranged between the larger diameter portion and the smaller diameter portion, and has peak portions and valley portions formed alternately with each other. The smaller diameter portion includes a shaft attachment portion having a radially outer surface in which a fitting groove for attachment of a boot band is formed, and a thin portion extending from the shaft attachment portion so as to be coupled with the bellows portion through intermediation of a thick portion and allowing buckling deformation with respect to the shaft attachment portion and the bellows portion.

Abstract: A boot-mounting structure for a constant velocity universal joint has a configuration which can prevent a crack caused by interference with a boot band while maintaining a stable sealing property. The boot band (69) is fitted into a fitting groove of a silicone boot (65), and is decreased in diameter while being attached into the fitting groove, to thereby fix the silicone boot (65). The boot band (69) is formed into an annular body not provided with a folded-back portion. There is provided a no-interference structure means (S) for preventing interference caused, when the boot band is decreased in diameter, between an axial outer-peripheral-edge portion (69a or 69b) of the band (69) and a bottom end portion (82a or 82b) of the fitting groove (75) corresponding thereto.

Abstract: A shaft mounting structure of a constant velocity joint is capable of ensuring sufficient strength of a fitting portion between an inner ring and a shaft. In the shaft mounting structure, a groove is formed on the shaft middle side compared to the position of a male spline of a shaft and the outside diameter of a bottom portion of the groove is set at a value larger than the root diameter of the male spline.

Abstract: Provided are a silicone boot for a constant velocity universal joint and a constant velocity universal joint, in which occurrence of cracks in a smaller diameter portion of the boot is suppressed and durability thereof is improved. The silicone boot for a constant velocity universal joint includes: a larger diameter portion (13) attached to an outer joint member (2) of a constant velocity universal joint; a smaller diameter portion (14) attached to a shaft (9) coupled with an inner joint member (4) of the constant velocity universal joint; and a bellows portion (15), which is arranged between the larger diameter portion (13) and the smaller diameter portion (14), and has peak portions (7) and valley portions (6) formed alternately with each other.

Abstract: Provided are a boot-mounting structure for a constant velocity universal joint and a silicone boot for a constant velocity universal joint, which can prevent a crack caused by interference with a boot band while maintaining a stable sealing property. The boot band (69) is fitted into a fitting groove of a silicone boot (65), and is decreased in diameter while being attached into the fitting groove, to thereby fix the silicone boot (65). The boot band (69) is formed into an annular body not provided with a folded-back portion. There is provided a no-interference structure means (S) for preventing interference caused, when the boot band is decreased in diameter, between an axial outer-peripheral-edge portion (69a or 69b) of the band (69) and a bottom end portion (82a or 82b) of the fitting groove (75) corresponding thereto.

Abstract: The present invention provides a shaft mounting structure of a constant velocity joint capable of ensuring sufficient strength of a fitting portion between an inner ring and a shaft. In the shaft mounting structure of the present invention, a groove 12 is formed on the shaft middle side compared to the position of a male spline 9 of a shaft 6 and the outside diameter of a bottom portion of the groove 12 is set at a value larger than the root diameter of the male spline 9.