Abstract: A gas sensor with improved sensitivity. The gas sensor comprises an active sensor unit, a reference sensor unit and a temperature control circuit. The active sensor unit has an active detector. The reference sensor unit has a reference detector. The temperature control circuit is provided and configured to keep a detector at a predetermined temperature.

Abstract: A ferrite magnet includes: a hexagonal ferrite main phase; and a second phase. The second phase is an oxide phase containing: an element A which is at least one selected from the group consisting of Ca, Sr, Ba, Bi, and rare earth elements; a transition metal element T including at least Fe; and an element G which is at least one selected from the group consisting of Si, Al, B, F, K, Na, Li, P, and S. When the total number of atoms of the element A, the transition metal element T, and the element G in the second phase is set to 100 at %, the element A occupies 30 to 80 at %, the element G occupies 15 to 40 at %, and the transition metal element T occupies less than 4 at %.

Abstract: An optical modulator includes a substrate, an optical waveguide layer having a Mach-Zehnder waveguide including first and second ridge waveguides propagating visible light, and made of lithium niobate, a buffer layer formed on the optical waveguide layer, a signal electrode formed on buffer layer, and first and second ground electrodes. The signal electrode and first ridge waveguide are arranged so that a distance in a horizontal direction between a center of the signal electrode in a width direction and a center of the first ridge waveguide in the width direction is 0.5 ?m or less. The second ground electrode and second ridge waveguide are arranged so that a distance in the horizontal direction between a side surface closer to the second ridge waveguide between two side surfaces of the second ground electrode and a center of the second ridge waveguide in the width direction is 2 ?m or less.

Abstract: A control device controlling a switching power supply circuit including first switching element and second switching element, wherein control device operates switching power supply circuit in accordance with operation mode according to difference between voltage value of input or of output voltage supply circuit, control device linearly changes duty ratio in PWM (Pulse Width Modulation) control of first switching element from first start point, and linearly changes duty ratio in PWM control of second switching element from second start point, in case in which operation mode operating switching power supply circuit is to be switched, first start point or the second start point are duty ratio in PWM control of first or second switching element before operation mode switching set as start point or second start point at which duty ratio in PWM control of first switching element or the second switching element after operation mode switching to be changed.

Abstract: An inductor includes a coil conductor, a magnetic body, and a resin material including the coil conductor and the magnetic body therein, and a gap is provided between the resin material and at least one first surface of the magnetic body.

Abstract: A power supply apparatus includes: a power supply terminal receiving a first voltage from outside; one or more step-down circuits each generating a second voltage to be supplied to a memory device; first and second coupling lines disposed parallel to each other and individually coupling the power supply terminal and the step-down circuit(s) to each other; a first switching device disposed on the first coupling line, between the power supply terminal and the step-down circuit(s); a step-up circuit disposed on the second coupling line and stepping up the first voltage supplied from the power supply terminal; a first capacitor disposed on the second coupling line, between the step-up circuit and the step-down circuit(s); a second switching device disposed on the second coupling line, between the step-up circuit(s) and the first capacitor, and a third switching device disposed on the second coupling line, between the first capacitor and the step-down circuit(s).

Abstract: A power supply apparatus includes: a power supply terminal receiving an input voltage from outside; first and second step-down circuits respectively generating first and second output voltages to be supplied to a memory device; first and second coupling lines coupling the power supply terminal and the first and second step-down circuits, respectively; a step-up circuit disposed on the first coupling line at a location between the power supply terminal and the first step-down circuit, and stepping up the input voltage; a switching device disposed on the first coupling line at a location between the step-up circuit and the first step-down circuit; a capacitor disposed on the first coupling line at a location between the switching device and the first step-down circuit; and a first reverse-flow prevention diode disposed on the second coupling line at a location between the power supply terminal and the second step-down circuit.

Abstract: A magnetic sensor includes at least one MR element, a ferromagnetic layer disposed to overlap the at least one MR element when viewed in a first direction, an insulating layer disposed on both sides of the at least one MR element in a second direction, an underlying layer disposed on the at least one MR element, the first ferromagnetic layer, and the insulating layer, and an antiferromagnetic layer disposed on the underlying layer. The antiferromagnetic layer includes an antiferromagnetic portion that faces the ferromagnetic layer via the underlying layer, and a non-facing part that faces the at least one MR element and the insulating layer via the underlying layer but does not face the ferromagnetic layer.

Abstract: A magnetic sensor includes at least one MR element, a ferromagnetic layer disposed to overlap the at least one MR element when viewed in a first direction, an insulating layer disposed on both sides of the at least one MR element in a second direction, and an antiferromagnetic layer disposed on the at least one MR element, the ferromagnetic layer, and the insulating layer. The antiferromagnetic layer includes an antiferromagnetic portion that faces the ferromagnetic layer, and a non-facing part that faces the at least one MR element and the insulating layer but does not face the ferromagnetic layer. No magnetic layer is present between the at least one MR element and the antiferromagnetic layer.

Abstract: A magnetic sensor includes an MR element, at least one yoke, and at least one magnetic field generator. The at least one yoke includes a magnetic layer made of a soft magnetic material, and is adjacent to the MR element and spaced at a distance apart from each other. The at least one magnetic field generator includes a ferromagnetic portion made of a ferromagnetic material and an antiferromagnetic portion made of an antiferromagnetic material and exchange-coupled with the ferromagnetic portion, and is configured to generate a magnetic field to be applied to the at least one yoke.

Abstract: Provided is an Sm—Fe—N rare earth magnet comprising Sm—Fe—N crystal grains. An oxygen content in the Sm—Fe—N rare earth magnet is 0.5% by mass or less on the basis of a total amount of the Sm—Fe—N rare earth magnet, and an average grain size of the Sm—Fe—N crystal grains is 1 ?m or less.

Abstract: In the motor, since the housing of the stator is made of soft magnetic material, magnetic resistance decreases, and interlinkage magnetic fluxes of the print coil wiring increase. Therefore, a high rotational torque is realized in the motor to which the stator is applied.

Abstract: Disclosed herein is an electronic circuit module that includes a circuit board, an electronic component mounted on an upper surface of the circuit board, and a mold member that covers the upper and side surfaces of the circuit board. The lower area of the side surface of the circuit board is exposed so as not to be covered with the mold member.

Abstract: To provide a thin film capacitor in which peeling-off of an electrode layer is less likely to occur. A thin film capacitor includes a metal foil having a roughened upper surface, a dielectric film covering the upper surface of the metal foil and having an opening for partly exposing the metal foil therethrough, a first electrode layer contacting the metal foil through the opening and further contacting the dielectric film, and a second electrode layer contacting the dielectric film without contacting the metal foil. With this configuration, both the first and second electrode layers can be disposed on the upper surface of the metal foil. In addition, the first electrode layer contacts not only the metal foil but also the dielectric film, making peeling of the first electrode layer less likely to occur.

Abstract: An electronic component includes a first main body and a second main body. The second main body is mounted on a first surface of the first main body. The first main body includes a first region that overlaps the second main body when viewed in a stacking direction, and a second region that does not overlap the second main body when viewed in the stacking direction. At least a part of the plurality of capacitor conductors is disposed in the first region. At least one inductor conductor includes a major part disposed in the second region, and a non-major part. The non-major part is disposed in the second region, or is disposed at least in part in the first region.

Abstract: An estimation system includes: a first sensor that can be disposed between a wheel and a tire mounted on the wheel and outputs a first sensor signal in accordance with a pressing force applied by the wheel and the tire; and a processor that estimates a state of a rotating body including the wheel and the tire based on the first sensor signal. The processor generates a first section signal by dividing the first sensor signal by a specific section and estimates the state of the rotating body based on the first section signal.

Abstract: A multilayer electronic component includes a first inductor, a second inductor, a capacitor, and a multilayer stack. The first inductor and the second inductor are arranged so that a first opening of the first inductor and a second opening of the second inductor do not face each other. The capacitor includes a capacitor conductor layer. The capacitor conductor layer includes a first overlapping portion overlapping with at least one first inductor conductor layer forming the first inductor when seen in a stacking direction.

Abstract: A signal processing circuit includes: a first element and a second element connected in series to each other between a first DC power supply and ground, with respective resistance values thereof varying in response to a change in a physical amount of an observation target; an operational amplifier having an inverting input terminal connected to a midpoint between the first element and the second element, a non-inverting input terminal connected to a second DC power supply, and an output terminal; and a feedback resistance connected between the output terminal and the inverting input terminal.

Abstract: A filter circuit includes an inductor provided between a signal path and a ground and including a first end electrically connected to the ground, a resonator provided between the signal path and the ground and including a third end electrically connected to the ground, and a capacitor provided on the signal path and electrically connected to a second end of the inductor and a fourth end of the resonator. The inductor is configured using an inductor element. The resonator is configured without using the inductor element.

Abstract: An element array circuit includes one or more first wirings, second wirings, impedance elements, one or more operational amplifiers, one or more first selectors, and one or more second selectors. The one or more first selectors each select one option from a first option group including a first option to apply a first potential to one of respective one or more first ends of the one or more first wirings and a second option to apply a second potential different from the first potential to the one of the one or more first ends. The one or more second selectors each select one option from a second option group including a third option to apply the first potential to one of respective one or more second ends of the first wiring(s) and a fourth option to apply the second potential to the one of the one or more second ends.