Abstract: A magnetic sensor device includes: a magnet; yokes arranged on the magnet; and a magnetoresistance effect element to which is applied a leakage magnetic field emitted from the yokes to an exterior thereof. A detection region of the magnetoresistance effect element is at the side opposite to the magnet. The magnetoresistance effect element detects a change of a bias magnetic field of the magnetoresistance effect element that occurs when the object to be detected including the hard magnetic material passes through the detection region. The magnetic sensor device can accurately detect an object to be detected using a hard magnetic material.

Abstract: A magnetic circuit, provided with a short magnet (1a) and short magnet (1b) that are arranged in an array, and a yoke (2a) and a yoke (2b) provided so as to sandwich the short magnet (1a) and short magnet (1b). The short magnet (1a) and short magnet (1b), are arranged, that have a space between them that is a predetermined gap (3) or less in the arrangement direction of the array respectively. In addition, the short magnet (1a) and short magnet (1b) are arranged so that one magnetic pole is located on the side toward one of the pair of yokes (2a) and (2b), and the other magnetic pole is located on the side toward the other yoke.

Abstract: A multilayer ceramic electronic component includes an electronic component element including a ceramic layer and an inner conductor, and outer electrodes disposed on the surface of the electronic component element. The outer electrodes include a first layer disposed on the surface of the electronic component element, and a second layer disposed on the first layer. The first layer includes an oxide of at least one of elements of the ceramic layer. The second layer does not include oxides of elements of the ceramic layer.

Abstract: A DC power supply device includes a rectifier circuit, a conversion circuit and a control circuit. Conversion circuit includes a first capacitor, a first series circuit, a second series circuit, a third series circuit, a second diode and a Zener diode. First series circuit includes a first inductor and a switching element connected in series with each other. Second series circuit includes a second capacitor and a second inductor connected in series with each other. Third series circuit includes a first diode and a third capacitor connected in series with each other. First series circuit is electrically connected between both ends of first capacitor. Second series circuit is electrically connected in parallel with switching element. A cathode of Zener diode is connected with a connection point of first inductor and second capacitor. Zener diode has a Zener voltage larger than an output voltage of conversion circuit.

Abstract: A lighting device includes a rectifier circuit, a conversion circuit, a constant current circuit and a control circuit. The conversion circuit includes a first series circuit, a second series circuit and a third series circuit. The conversion circuit is configured to output a DC current by on/off of a switching element being controlled by the control circuit. A high potential-side terminal of the third capacitor is electrically connected to an output terminal. The low potential-side terminal of the third capacitor is electrically connected to an output terminal, via the constant current circuit.

Abstract: A magnetic circuit, provided with a short magnet (1a) and short magnet (1b) that are arranged in an array, and a yoke (2a) and a yoke (2b) provided so as to sandwich the short magnet (1a) and short magnet (1b). The short magnet (1a) and short magnet (1b), are arranged, that have a space between them that is a predetermined gap (3) or less in the arrangement direction of the array respectively. In addition, the short magnet (1a) and short magnet (1b) are arranged so that one magnetic pole is located on the side toward one of the pair of yokes (2a) and (2b), and the other magnetic pole is located on the side toward the other yoke.

Abstract: A magnetic sensor device includes: a magnetic field generator, disposed at one surface side of a sheet-like to-be-detected object including a magnetic component, to generate an intersecting magnetic field intersecting the object; and a magnetoresistive effect element disposed between the object and the magnetic field generator, having a resistance value changing in accordance with change of a component of the intersecting magnetic field in a conveyance direction along which the object is conveyed, when the object is conveyed. The magnetoresistive effect element includes resistive elements adjacent to each other in the conveyance direction and interconnected by a bridge, disposed in linear symmetry relative to an axis perpendicular to the conveyance direction and extending through a center of the bridge. A position in the conveyance direction of the bridge center of the magnetoresistive effect element coincides with a position in the conveyance direction of the magnetic field generator center.

Abstract: A DC power supply device includes a rectifier circuit, a conversion circuit and a control circuit. Conversion circuit includes a first capacitor, a first series circuit, a second series circuit, a third series circuit, a second diode and a Zener diode. First series circuit includes a first inductor and a switching element connected in series with each other. Second series circuit includes a second capacitor and a second inductor connected in series with each other. Third series circuit includes a first diode and a third capacitor connected in series with each other. First series circuit is electrically connected between both ends of first capacitor. Second series circuit is electrically connected in parallel with switching element. A cathode of Zener diode is connected with a connection point of first inductor and second capacitor. Zener diode has a Zener voltage larger than an output voltage of conversion circuit.

Abstract: A magnetic circuit, provided with a short magnet and short magnet that are arranged in an array, and a yoke and a yoke provided so as to sandwich the short magnet and short magnet. The short magnet and short magnet, are arranged, that have a space between them that is a predetermined gap or less in the arrangement direction of the array respectively. In addition, the short magnet and short magnet are arranged so that one magnetic pole is located on the side toward one of the pair of yokes and, and the other magnetic pole is located on the side toward the other yoke.

Abstract: A magnetic sensor device includes: a magnet; yokes arranged on the magnet; and a magnetoresistance effect element to which is applied a leakage magnetic field emitted from the yokes to an exterior thereof A detection region of the magnetoresistance effect element is at the side opposite to the magnet. The magnetoresistance effect element detects a change of a bias magnetic field of the magnetoresistance effect element that occurs when the object to be detected including the hard magnetic material passes through the detection region. The magnetic sensor device can accurately detect an object to be detected using a hard magnetic material.

Abstract: A magnetic field generator disposed on one surface side of a sheet-shaped object-to-be-detected contains a magnetic component. The magnetic field generator includes a first magnetic pole part that forms a first magnetic pole, and a second magnetic pole part that forms a second magnetic pole with reverse polarity of the first magnetic pole. The magnetic field generator generates a cross magnetic field that crosses the object-to-be-detected. An MR element is disposed between the first magnetic pole part and the object-to-be-detected. The resistance value of the MR element changes according to a change in a component of the cross magnetic field in a conveying direction. The position of the MR element in the conveying direction is position shifted along the conveying direction from the center position of the first magnetic pole part in the conveying direction, and located between both ends of the first magnetic pole part in the conveying direction.

Abstract: A lighting device includes: a signal converting circuit which receives a dimming signal that is a rectangular voltage signal, and converts the dimming signal to a DC voltage signal corresponding to a duty ratio of the dimming signal; and a power supply circuit which receives an AC voltage and outputs DC current having a current value corresponding to the DC voltage signal. The signal converting circuit includes a resistor-capacitor (RC) circuit which integrates a signal corresponding to the dimming signal by way of charging and discharging to produce the DC voltage signal, and a time constant of the RC circuit during charging is greater than a time constant of the RC circuit during discharging.

Abstract: The lighting device includes a converter circuit including a switching device, a first inductor, and a second inductor. The first inductor and the second inductor have winding directions such that a magnetic field of the first inductor and a magnetic field of the second inductor have a canceling effect on each other. The switching device is mounted on the substrate so as to be present between the first inductor and the second inductor.

Abstract: A lighting device includes: a signal converting circuit which receives a dimming signal that is a rectangular voltage signal, and converts the dimming signal to a DC voltage signal corresponding to a duty ratio of the dimming signal; and a power supply circuit which receives an AC voltage and outputs DC current having a current value corresponding to the DC voltage signal. The signal converting circuit includes a resistor-capacitor (RC) circuit which integrates a signal corresponding to the dimming signal by way of charging and discharging to produce the DC voltage signal, and a time constant of the RC circuit during charging is greater than a time constant of the RC circuit during discharging.

Abstract: A lighting device includes a rectifier circuit, a conversion circuit and a control circuit. A first inductor of a first series circuit and a second inductor of a second series circuit have inductances by which a time period, during which a diode is electrically conducted, is made shorter than a half period of a resonance period of a closed loop circuit. The closed loop circuit includes a first capacitor, the first inductor, a second capacitor and a third capacitor. The control circuit is configured to control a switching element in such a manner that the switching element is turned on at fixed periods.