Abstract: An in-vehicle power supply device includes a first voltage conversion unit for performing at least a step-down operation to lower a voltage applied to a first conductive path electrically connected to an in-vehicle power storage unit, and apply the lowered voltage to a second conductive path; a second voltage conversion unit for performing at least the step-down operation to lower a voltage applied to a first conductive path and apply the lowered voltage to a second conductive path, a second voltage conversion unit having a smaller power capacity than the first voltage conversion unit; a driving unit that drives the first voltage conversion unit and the second voltage conversion unit, and a capacitor that is electrically connected to the second conductive path and is charged with a current flowing through the second conductive path.

Abstract: As paths for a current flowing through a conductor, a first current path through which a current flows from a first conductive portion to a second conductive portion, and a second current path through which a current flows from a third conductive portion to the second conductive portion are provided. Each of the first conductive portion, the second conductive portion, and the third conductive portion has a plate shape, a point P1 is located on a plate surface of the first conductive portion, and a point P2 is located on a plate surface of the second conductive portion. A current detecting circuit detects a value related to a potential difference between the points P1 and P2, and outputs a voltage value corresponding to a values of a current flowing through each of the first current path and the second current path.

Abstract: An in-vehicle power supply device includes a first voltage conversion unit for performing at least a step-down operation to lower a voltage applied to a first conductive path electrically connected to an in-vehicle power storage unit, and apply the lowered voltage to a second conductive path; a second voltage conversion unit for performing at least the step-down operation to lower a voltage applied to a first conductive path and apply the lowered voltage to a second conductive path, a second voltage conversion unit having a smaller power capacity than the first voltage conversion unit; a driving unit that drives the first voltage conversion unit and the second voltage conversion unit, and a capacitor that is electrically connected to the second conductive path and is charged with a current flowing through the second conductive path.

Abstract: A circuit assembly includes a circuit board having a conductive path, and an electric current sensor for detecting an electric current shunted from the conductive path, the electric current sensor being connected in parallel to a section of the conductive path that is not connected to any element having a resistance.

Abstract: A circuit assembly includes a circuit board having a conductive path, and an electric current sensor for detecting an electric current shunted from the conductive path, the electric current sensor being connected in parallel to a section of the conductive path that is not connected to any element having a resistance.

Abstract: As paths for a current flowing through a conductor, a first current path through which a current flows from a first conductive portion to a second conductive portion, and a second current path through which a current flows from a third conductive portion to the second conductive portion are provided. Each of the first conductive portion, the second conductive portion, and the third conductive portion has a plate shape, a point P1 is located on a plate surface of the first conductive portion, and a point P2 is located on a plate surface of the second conductive portion. A current detecting circuit detects a value related to a potential difference between the points P1 and P2, and outputs a voltage value corresponding to a values of a current flowing through each of the first current path and the second current path.

Abstract: An inspection apparatus for an optical transmission device selects an optical path in accordance with the wavelength of an optical signal transmitted from the optical transmission device and displays an indication of the wavelength of the selected optical signal according to an electrical signal. Thus, an optical transmission device used for single-optical-fiber bidirectional transmission easily can be checked as to whether it is provided for a subscriber or for a central station using different wavelengths.

Abstract: An inspection apparatus for an optical transmission device comprises a coupling means to be optically coupled to an optical transmission device, a selecting means for optically separating and selecting an optical signal of a specific wavelength from a plurality of optical signals having different wavelengths transmitted from the optical transmission device, a converting means for converting the selected optical signal into an electrical signal, and a displaying means for displaying the selected wavelength according to the electrical signal. The wavelength of a transmission signal from the optical transmission device can be easily and visually checked by selecting a signal of a specific wavelength out of a plurality of signals having different wavelengths transmitted from the transmission device, and by displaying the selected wavelength by the displaying means.

Abstract: A broad band digital exchange is provided which includes a Banyan network or Batcher Banyan network which is used in an ATM machine for selectively connecting digital information. In such networks, cells which retain information may conflict so that the cell is discarded. Thus, all input information is not always transmitted. In order to lower the cell discard rate, various techniques have been proposed. In the present invention, an identification bit is provided in a header of the cell. When cells conflict, the identification bit of the losing cell is set so that the losing cell does not impede the transmission of information contained in the other cell. In another aspect, when cells conflict, a conflict detection signal is sent back to a buffer controller which controls the send-out of the information cells. In another aspect, the conflict detection signal is sent back to the buffer controller through a path through which the losing cell has been supplied.