Abstract: Provided is a delta-sigma AD converter including a delta-sigma modulating section that outputs a digital signal obtained by performing delta-sigma modulation with an oversampling ratio on an input analog signal; a digital filtering section that filters the digital signal with the oversampling ratio; a control terminal into which an external control signal is input; an output control section that performs control to output an output signal based on the filtered digital signal, according to the external control signal; and a setting section that sets the oversampling ratio based on interval information of the external control signal.

Abstract: A current sensor (current detection device) 100 includes a conductor 10 through which measurement-target current flows, a magnetic sensor 30 that detects magnetic fields generated by current flowing through the conductor and a package 60 that, together with at least part of the conductor, separates the magnetic sensor from the conductor and covers and seals in their outer surfaces. Together with a curved portion 13 of the conductor, the package separates, from the conductor through which measurement-target current flows, the magnetic sensor that detects magnetic fields generated by current flowing through the conductor and covers and seals in their outer surfaces so that an interface that can spread in the package, in which the magnetic sensor is embedded, from its boundaries with it is not formed; therefore, a high withstand voltage can be obtained.

Abstract: A magnetic sensor device includes a composite chip component, and a sensor chip mounted on the composite chip component. The sensor chip includes a first magnetic sensor, a second magnetic sensor, and a third magnetic sensor that detect components of an external magnetic field that are in directions parallel to an X direction, parallel to a Y direction, and parallel to a Z direction, respectively. The composite chip component includes a first magnetic field generator, a second magnetic field generator, and a third magnetic field generator for generating additional magnetic field components that are in directions parallel to the X direction, parallel to the Y direction, and parallel to the Z direction, respectively.

Abstract: An optical concentration measuring device capable of power saving and lifespan extension of a light source is provided, including a light source emitting an amount of light corresponding to a supplied power; a light detection part receiving at least a part of the light emitted by the light source and generating a signal corresponding an amount of received light as an output signal; a smoothing filter smoothing a signal based on the output signal; a signal change amount calculation part calculating a first and a second change amounts corresponding to a change amount between at least two selected acquisition values selected from acquisition values based on the output signal at current or past time; a light source control part controlling the power supplied to the light source based on the first change amount; and a filter control part controlling characteristics of the smoothing filter based on the second change amount.

Abstract: To downsize a magnetic sensor by reducing the number of terminals of the magnetic sensor. A magnetic sensor to detect a magnetic field is provided, including: a drive terminal; a first output terminal; a second output terminal; and a magnetic sensing unit in which a first conduction path through which a driving current flows between the drive terminal and the first output terminal and a second conduction path through which a driving current flows between the drive terminal and the second output terminal are formed integrally. The magnetic sensing unit may have a first extending unit extending to the first output terminal and a second extending unit extending to the second output terminal.

Abstract: An adjusting method of a camera module, a lens position control device, a control device of a linear movement device, and a controlling method of the same are provided in a state of the cameral module in which an imaging element and an actuator are combined. The camera module includes a position sensor (53) that detects a position of a lens (50) to output a detection position signal, a storage unit (541) that stores and rewrites a position code value corresponding to the position of the lens, a target position signal generation unit (542) that outputs a target position signal based on the position code value and the target position code value, and a control unit (543) that generates a control signal based on the target position signal and the detection position signal.

Abstract: To provide a current sensor with high sensitivity, provided is a current sensor including a sealing portion; a first conductor that includes a bent portion bent in a planar view within the sealing portion and two end portions that are exposed from the sealing portion; a second conductor that includes a bent portion bent in the planar view within the sealing portion and two end portions that are exposed from the sealing portion; a first magnetic sensor that is provided within the sealing portion and arranged inside the first conductor in the planar view; and a second magnetic sensor that is provided within the sealing portion and arranged inside the second conductor in the planar view, wherein one end portion of the first conductor and one end portion of the second conductor are electrically connected.

Abstract: To reduce distortion of output analog signals generated at a current-output DA converter. A DA converter that outputs a differential analog signal corresponding to an input digital signal is provided, including: a current output unit outputting a current corresponding to the digital signal to each of first and second wires; a converting unit outputting, as positive-side and negative-side analog signals, voltage signals based on currents flowing through the first and second wires, respectively; a first noise reducing unit having: a first switch switched to be or not to be electrically connected with the first wire; and a first buffer provided between the first switch and a reference potential; and a second noise reducing unit having: a second switch switched to be or not to be electrically connected with the second wire; and a second buffer provided between the second switch and the reference potential.

Abstract: An optical waveguide (10) includes a substrate (15), a core layer (11) that extends along the longitudinal direction and through which infrared light IR can propagate, and a support (17) formed from a material with a smaller refractive index than the core layer (11) and configured to connect at least a portion of the substrate (15) and at least a portion of the core layer (11) to support the core layer with respect to the substrate (15). A connecting portion (171) of the support (17) connected to the core layer (11) is shifted from the position having the shortest distance from the center to the outer surface in a cross-section perpendicular to the longitudinal direction of the core layer (11).

Abstract: A gas detection apparatus (100) includes a first layer (1) and a second layer (2) disposed opposite the first layer (1) in a predetermined direction (z-axis direction). The first layer (1) includes a light emitter that emits light and a light receiver that receives the light after the light passes through a waveguide. The second layer (2) includes a light input unit of the waveguide opposite the light emitter in the predetermined direction (z-axis direction) and a light output unit of the waveguide opposite the light receiver in the predetermined direction (z-axis direction). The gas detection apparatus (100) can be miniaturized.

Abstract: A DA converter to reduce second-order harmonic distortion more precisely with convenient configurations. A DA converter including: a DA converting unit to input reference voltage and a digital value and output an analog signal according to the digital value based on the reference voltage; and a superimposing unit to superimpose, on the reference voltage, a superimposing signal based on the analog signal that is output from the DA converting unit, and a DA converting method are provided. The DA converter may further include a setting input unit to input setting regarding at least one of a superimposing amount and a sign of an analog signal to be included in the superimposing signal. Also, an adjusting apparatus and an adjusting method to adjust the DA converter are provided.

Abstract: A camera module includes a lens, a first magnet and a second magnet mounted on a mobile body including the lens, a coil portion arranged near the first magnet and configured to move the first magnet in a first direction, and the magnetic sensor arranged near the second magnet and configured to detect the position of the second magnet in the first direction as a detection direction.

Abstract: This invention aims at providing a temperature characteristic adjustment circuit capable of adjusting the temperature characteristic to various positive and negative temperature characteristics with an excessively small characteristic variation and capable of suppressing an increase in the chip area and the current consumption with a simple circuit configuration. A temperature characteristic adjustment circuit has a current source having a nonvolatile storage element having a control gate region and a source region and driven by the application of a bias between the control gate region and the source region and an output circuit not having a nonvolatile storage element, in which the temperature dependency of an output signal originating from the temperature dependency of the current amount of a current output from the current source is adjusted by the nonvolatile storage element.

Abstract: Provided is a temperature-compensated voltage generating circuit that generates a temperature-compensated voltage which is supplied to an oscillator circuit. The temperature-compensated voltage generating circuit includes a temperature detecting circuit that detects a temperature; a high frequency attenuating part that attenuates at least a part of a frequency component which is higher than a direct-current component of an output of the temperature detecting circuit; an adder that adds the output of the temperature detecting circuit and an output of the high frequency attenuating part; and a compensated voltage generating part that generates the temperature-compensated voltage based on an output of the adder.

Abstract: Provided is an infrared detecting device with high SNR. The infrared detecting device includes: a semiconductor substrate; a first compound semiconductor layer; a light receiving layer formed on the first compound semiconductor layer and containing at least In and Sb and having a predetermined range(s) of Al or Al and Ga proportion(s); a third compound semiconductor layer; and a second compound semiconductor layer containing at least In, Al, and Sb and having a predetermined range(s) of Al or Al and Ga proportion(s), in which the first compound semiconductor layer includes, in the stated order, a first A layer, a first B layer, and a first C layer, each containing at least In and Sb and having a predetermined range(s) of Al or Al and Ga proportion(s), and the proportion(s) of the Al composition or the Al composition and the Ga composition of each layer satisfy a predetermined relation(s).

Abstract: A light-emitting/receiving device including: a diode-type light-emitting element formed on a semiconductor substrate; a diode-type light-receiving element formed on the semiconductor substrate; a light source driving unit configured to supply a first common voltage to an anode or a cathode of the light-emitting element to drive the light-emitting element; and a light signal processing unit configured to perform current/voltage conversion on an output current outputted from the light-receiving element, by referring to a second common voltage.

Abstract: To achieve the miniaturization of and the enhancement of the strength of a semiconductor element.

Abstract: It is an object of this invention to provide an optical waveguide, an optical concentration measuring device, and a method for manufacturing an optical waveguide capable of achieving an improvement of evanescent wave exuding efficiency of propagating light and light extraction efficiency. A core layer provided in an optical waveguide has a first portion having a first film thickness, a second portion having a second film thickness different from the first film thickness, and a third portion connecting the first portion and the second portion. The third portion is formed so that the film thickness is gradually increased from the second portion having the smaller film thickness toward the first portion having the larger film thickness between the first portion and the second portion, and the maximum inclination angle is 10° or more and 45° or less.

Abstract: A magnetic sensor device includes three magnetic sensors for detecting components of an external magnetic field that are in three directions, a magnetic field generation section, and a correction processor. The magnetic field generation section generates additional magnetic field components in three directions used for measurements of main- and cross-axis sensitivities of the three magnetic sensors. The correction processor corrects respective detection signals of the three magnetic sensors on the basis of the measurement results of the main- and cross-axis sensitivities of the magnetic sensors.

Abstract: The optical device includes a photoelectric conversion block including a photoelectric conversion chip configured to include photoelectric conversion elements arranged in a matrix and a first sealing member configured to cover side faces of the photoelectric conversion chip to expose the photoelectric conversion chip and a lens block including a lens and a second sealing member configured to cover side faces of the lens to expose one surface and an other surface of the lens. In the lens block, the one surface of the lens and the second sealing member forms a recessed portion, at least a part of a bottom surface of the recessed portion being formed by the one surface of the lens, a sidewall of the recessed portion being formed by the second sealing member, and the recessed portion being arranged such that the photoelectric conversion chip exposed from the first sealing member is covered.