Abstract: A rotor includes magnets, and magnet holes each of which includes an opening extending in a radial direction in plan view, penetrates a rotor core in the axial direction, and includes the magnet located therein. A magnetic pole surface of the magnet opposes a circumferential direction. The rotor core includes first thin plate cores and second thin plate cores. The first thin plate cores include an annular first inner plate, first outer plates on a radially outer side of the first inner plate and arrayed side by side in the circumferential direction, first inner connecting portions connecting the first inner plate and the first outer plate, and a first outer connecting portion that is on a radially outer side of the first outer plate and connects the adjacent first outer plates in the circumferential direction.

Abstract: A transmitter includes a first PCB having a first surface on which first ground wires and anode wires connecting a light-emitting element and a driver are formed, the anode wires being covered with an insulating section, and a second surface on which a second ground wire coupled to the first ground wires is formed, the second surface being opposite the first surface, a connector that supports the first PCB and is coupled to the second ground wire, a conductive housing that covers the first PCB and the connector, a coupling member in contact with the housing and the first ground wires, the coupling member coupling the housing and the first ground wires, and a second PCB on which the connector and the housing are mounted, the second PCB including a third ground wire that is coupled via the connector to the second ground wire and is coupled to the housing.

Abstract: A quadrature oscillator includes a first oscillator that outputs a first differential signal, and a second oscillator that outputs a second differential signal having phases that are different from those of the first differential signal, wherein the first oscillator includes a first LC resonator having an inductor and a capacitor coupled in parallel, a first cross-coupled circuit having a first pair of cross-coupled transistors coupled to the first LC resonator, a first tail current source coupled to the first pair of transistors, first input differential pair transistors to which the second differential signal is to be input, and a first pair of harmonic resonators disposed in input sections of the first input differential pair transistors, the first pair of the harmonic resonators have a resonance frequency of an odd multiple of a resonance frequency of the first oscillator.

Abstract: A scroll casing forms a scroll flow passage of a centrifugal compressor, and, provided that, in a cross section of the scroll flow passage, Eo is an outer end of the scroll flow passage in a radial direction of the centrifugal compressor, Ef is a front end of the scroll flow passage in an axial direction of the centrifugal compressor, and Mw is a middle point of a maximum flow-passage width Wmax of the scroll flow passage in the radial direction, a flow passage height H of the scroll flow passage in the axial direction gradually increases from a position of the outer end Eo to a position of the front end Ef with respect to the radial direction, and the scroll flow passage has a recirculation flow suppressing cross section in which the front end Ef is disposed on an inner side, in the radial direction, of the middle point Mw, in a section disposed at least partially in a region closer to a scroll start than a connection position of the scroll start and a scroll end.

Abstract: A four-phase oscillator includes, a first oscillator configured to output a first differential signal, a second oscillator configured to output a second differential signal shifted in phase with respect to the first differential signal by 90 or ?90 degrees, and a control circuit. The first oscillator includes a first tail current source and a second tail current source. The second oscillator includes a third tail current source and a fourth tail current source. The control circuit changes the frequency of the first and second differential signals by controlling at least one of a difference between a first current value supplied from the first tail current source and a third current value supplied from the third tail current source and a difference between a second current value supplied from the second tail current source and a fourth current value supplied from the fourth tail current source.

Abstract: A lens mirror array includes a plurality of optical elements connected to each other and aligned along one direction. Each of the optical elements comprises a first lens surface on which light is incident, a first reflection surface on which the incident light is reflected within the optical element, a second reflection surface on which the reflected light is further reflected within the optical element, a second lens surface through which the light reflected by the second reflection surface is emitted outside the optical element, and a protruding portion having a plurality of surfaces and connected to the first lens surface and the second reflection surface. One of the surfaces of the protruding portion inclined with respect to a direction of light incident on the protruding portion has a prism structure.

Abstract: An optical device includes a light emitting surface, a lens mirror array having an incident surface that transmits light from the light emitting surface and converges the light, an emission surface that emits the light incident through the incident surface, and a plurality of reflecting surfaces that reflect the light incident through the incident surface toward the emission surface, and an image plane where an image of the light emitted through the emission surface is formed. The light emitting surface and the image plane are disposed nonparallel to each other so that an imaginary first plane parallel to the light emitting surface and an imaginary second plane parallel to the image plane intersect at a side of the plurality of reflecting surfaces.

Abstract: A transmitter includes a first PCB having a first surface on which first ground wires and anode wires connecting a light-emitting element and a driver are formed, the anode wires being covered with an insulating section, and a second surface on which a second ground wire coupled to the first ground wires is formed, the second surface being opposite the first surface, a connector that supports the first PCB and is coupled to the second ground wire, a conductive housing that covers the first PCB and the connector, a coupling member in contact with the housing and the first ground wires, the coupling member coupling the housing and the first ground wires, and a second PCB on which the connector and the housing are mounted, the second PCB including a third ground wire that is coupled via the connector to the second ground wire and is coupled to the housing.

Abstract: An optical transmitting device includes a plurality of transmitters configured to be arranged so as to correspond to a plurality of channels, the transmitters each reproducing a clock from an input data signal, and outputting the data signal identified and reproduced based on the reproduced clock to a light emitting element and a processor configured to control phase difference between the output data signals based on a result of comparison between phases of the reproduced clocks.

Abstract: In accordance with an embodiment, a lens mirror array includes a plurality of optical elements integrally connected in a first direction. Each optical element includes an incident side lens surface through which light enters the optical element, a ridge located at an edge of the incident side lens surface, a reflection surface on which light incident on the incident side lens surface is reflected, an exit side lens surface through which light reflected by the reflection surface exits the optical element, and a groove surrounding the reflection surface except for a portion adjacent to the ridge, the portion adjacent to the ridge connecting to an adjacent optical element in the plurality of optical elements.

Abstract: A stator includes a stator core disposed about a central axis and covered by an insulator, coils installed on the stator core through the insulator, and an intermediate bus bar electrically connected to a portion of a conducting wire constituting the coils. A method of manufacturing a stator includes a mounting process, a winding process, and a connecting process. An intermediate bus bar is supported at a first position spaced apart from a coil in an axial direction in a mounting portion before the start of the winding process. The intermediate bus bar is fixed at a second position between the first position and the coils in the axial direction after the completion of the winding process.

Abstract: A motor includes a magnet rotating together with a rotor about a central axis, a substrate on which a sensor to detect a position of the magnet is installed, a housing to hold a stator to drive the rotor, a bearing assembly including a bearing holder, and a conductor assembly between the housing and the bearing assembly. The conductor assembly includes a conductor including a first conductor electrically connected to the sensor through the substrate and a conductor holder covering the conductor. The substrate is fixed to the conductor holder. In the radial direction, a gap is located between an outer side surface of the bearing holder and an inner side surface of the conductor holder, and at least a portion of the magnet is located in the gap.

Abstract: A lens mirror array includes a plurality of optical elements connected to each other and aligned along one direction. Each of the optical elements comprises a first lens surface on which light is incident, a first reflection surface on which the incident light is reflected within the optical element, a second reflection surface on which the reflected light is further reflected within the optical element, a second lens surface through which the light reflected by the second reflection surface is emitted outside the optical element, and a protruding portion having a plurality of surfaces and connected to the first lens surface and the second reflection surface. One of the surfaces of the protruding portion inclined with respect to a direction of light incident on the protruding portion has a prism structure.

Abstract: A quadrature oscillator includes a first oscillator that outputs a first differential signal, and a second oscillator that outputs a second differential signal having phases that are different from those of the first differential signal, wherein the first oscillator includes a first LC resonator having an inductor and a capacitor coupled in parallel, a first cross-coupled circuit having a first pair of cross-coupled transistors coupled to the first LC resonator, a first tail current source coupled to the first pair of transistors, first input differential pair transistors to which the second differential signal is to be input, and a first pair of harmonic resonators disposed in input sections of the first input differential pair transistors, the first pair of the harmonic resonators have a resonance frequency of an odd multiple of a resonance frequency of the first oscillator.

Abstract: A rotor includes a rotor core including laminated thin plate cores. A single thin plate core includes an inner plate portion defining a portion of an inner core portion and outer plate portions defining a portion of an outer core portion. At least some of the laminated thin plate cores include a connecting portion. A number of connecting portion is one or a plurality, and, when the number of connecting portions is a plurality, the connecting portions at positions other than both left and right sides of each other in a circumferential direction, and, in plan view, the thin plate core includes the connecting portion at a position different from that of a connecting portion in another thin plate core adjacent in an axial direction.

Abstract: An optical receiver includes a light receiving element array that includes a plurality of light receiving elements, a plurality of amplifiers that amplify respective currents obtained by the plurality of light receiving elements, a plurality of anode lines arranged in a region between the light receiving element array and the plurality of amplifiers, the plurality of anode lines coupling respective anodes of the plurality of light receiving elements to the plurality of amplifiers, respectively, and a cathode line disposed in a region different from the region between the light receiving element array and the plurality of amplifiers, the cathode line coupling respective cathodes of the plurality of light receiving elements to a bias power supply and a bypass capacitor.

Abstract: An optical communication apparatus includes: a light-receiving device that receives an optical signal transmitted from another optical communication apparatus through an optical fiber and converts the optical signal into an electrical signal; a first measurement circuit that measures an average power and a modulation power of the optical signal based on the electrical signal; a light-emitting device that transmits the optical signal to the another optical communication apparatus by emitting light in accordance with a driving current; a driver that causes the light-emitting device to transmit the optical signal according to a transmission signal by controlling the driving current based on the transmission signal; and a processor that adjusts the driving current based on the average power and the modulation power.

Abstract: A wind power generation system comprising: a wind power generation equipment having a rotor which is operative to convert energy of received wind to rotational energy, a rotatable nacelle which supports the rotor, a tower which supports the rotatable nacelle, a floating body which supports the tower and at least a part of the floating body is positioned above the surface of the sea, a fixing member which is installed or fixed on the sea bed, a mooring member which couples the floating body and the fixing member, wherein the mooring member is coupled to the floating body at place upward of the center of gravity of the floating body and the wind power generation equipment, and the floating body is practically supported by one fixing member.

Abstract: A quadrature oscillation circuit includes a plurality of adjacent quadrature oscillators, wherein a first quadrature oscillator includes a first I-phase inductor, a first Q-phase inductor, and a first drive circuit that generates a first I-phase current passing the first I-phase inductor and a first Q-phase current passing the first Q-phase inductor such that phases of a first I-phase differential signal from the first I-phase inductor are different from phases of a first Q-phase differential signal from the first Q-phase inductor, a second quadrature oscillator includes a second I-phase inductor, a second Q-phase inductor, and a second drive circuit that generates a second I-phase current passing the second I-phase inductor and a second Q-phase current passing the second Q-phase inductor such that phases of a second I-phase differential signal from the second I-phase inductor are different from phases of a second Q-phase differential signal from the second Q-phase inductor.

Abstract: A quadrature oscillation circuit includes a plurality of adjacent quadrature oscillators, wherein a first quadrature oscillator includes a first I-phase inductor, a first Q-phase inductor, and a first drive circuit that generates a first I-phase current passing the first I-phase inductor and a first Q-phase current passing the first Q-phase inductor such that phases of a first I-phase differential signal from the first I-phase inductor are different from phases of a first Q-phase differential signal from the first Q-phase inductor, a second quadrature oscillator includes a second I-phase inductor, a second Q-phase inductor, and a second drive circuit that generates a second I-phase current passing the second I-phase inductor and a second Q-phase current passing the second Q-phase inductor such that phases of a second I-phase differential signal from the second I-phase inductor are different from phases of a second Q-phase differential signal from the second Q-phase inductor.