Abstract: A motor control circuit has an n-phase inverter that controls a motor of n-phases (n is an integer of three or more), a current detection circuit that detects a motor current flowing through the motor of the n-phases, and a current control circuit that controls the inverter for each of a control cycle based on a command current and the motor current detected by the current detection circuit. The inverter includes transistor pairs of the n-phases provided for each phase of the motor, and the current control circuit stops, for each of the control cycle, a switching operation in at least one transistor pair of the transistor pairs of the n-phases.

Abstract: An physiological measurement device provides a device body having a base, legs extending from the base and an optical housing disposed at ends of the legs opposite the base. An optical assembly is disposed in the housing. The device body is flexed so as to position the housing over a tissue site. The device body is unflexed so as to attach the housing to the tissue site and position the optical assembly to illuminate the tissue site. The optical assembly is configured to transmit optical radiation into tissue site tissue and receive the optical radiation after attenuation by pulsatile blood flow within the tissue.

Abstract: An oscillation circuit has a first oscillator having output nodes of n stages, where n is an integer of 3 or more, a second oscillator having output nodes of n stages, and a third oscillator having output nodes of n stages. An output node at an a-th stage of the first oscillator and an output node at an a-th stage of the second oscillator are connected with each other, where a is an integer of 1 or more and n or less and an output node at a b-th stage of the second oscillator and an output node at a b-th stage of the third oscillator are connected with each other, where b is an integer of 1 or more and n or less different from a.

Abstract: An electronic apparatus capable of determining a distance to an object based on reflected light provided by a reflection of pulsed light on the object has detectors configured to detect reception light to measure times from an emission of the pulsed light to detections of the reception light; and processing circuitry configured to determine a duration in which the reflected light is received based on the times, determine, based on one of the times in the duration, a reception timing of the reflected light included in the reception light, and determine the distance from the electronic apparatus to the object according to the reception timing of the reflected light.

Abstract: A distance measuring device has a plurality of light receiving elements each of which receives a reflected optical signal reflected by an object, and an image processor that generates a distance image in accordance with distances to the object, based on signal intensities and light reception timings of the reflected optical signal received by the plurality of light receiving elements, wherein the image processor detects a direction of the object, based on at least either the signal intensities of the reflected optical signal received by the light receiving elements or the distances to the object measured based on the reflected optical signal, and divides at least one or some of pixels included in the distance image, based on the direction of the detected object.

Abstract: An image processing apparatus has a light source that emits a light signal at a predetermined time interval, a scanner capable of changing at least one of a scanning range or a scanning timing of the light signal for each of frames, a light receiver that receives a reflected light signal reflected on an object by irradiating the object with the light signal, processing circuitry that generates a distance image for each of the frames based on the reflected light signal received by the light receiver, and synthesizes the distance images of a plurality of the frames to generate a high-resolution distance image.

Abstract: A light detection apparatus has an array of first light detectors arranged at a first interval and configured to convert reception light into first signals, second light detectors having a first crosstalk rate and configured to convert reception light into second signals, wherein surfaces of the second light detectors are shielded from light, third light detectors having a second crosstalk rate different from the first crosstalk rate and configured to convert reception light into third signals, wherein surfaces of the third light detectors are shielded from light, and control circuitry configured to control an operation point of the array based on the second signals and the third signals.

Abstract: A light projecting apparatus has a plurality of light projectors, each being capable of switching an emission direction and an emission timing of an optical signal, and a plurality of first controllers, each controlling an emission direction and an emission timing of an optical signal emitted from a corresponding light projector among the plurality of light projectors.

Abstract: Provided is a photodetector including: a photodetection element; a reset circuit that sets one end of the photodetection element to an initialization voltage after the photodetection element detects light, and that includes a variable current source capable of varying a current to be supplied to the one end of the photodetection element; and a control circuit that stepwise or continuously increases a current to be supplied to the one end of the photodetection element by using the variable current source until the one end of the photodetection element is set to the initialization voltage after the photodetection element detects light.

Abstract: An electronic apparatus capable of determining a distance to an object based on at least first reflected light provided by a reflection of first pulsed light on the object and second reflected light provided by a reflection of a second pulsed light on the object has an input terminal to receive an electrical signal of intensity of reception light, and processing circuitry to specify, based on the electrical signal, a first duration from when the first pulsed light is emitted until when the first reflected light is received within a first measurement range, and determine, based on the first duration, a second measurement range of the second reflected light, specify, a second duration from when the second pulsed light is emitted until when the second reflected light is received within the second measurement range, and determine the distance from the electronic apparatus to the object.

Abstract: A semiconductor circuitry includes an oscillator configured to output an oscillation signal whose frequency depends on a first input signal, a counter configured to count a number of cycles of the oscillation signal, first circuitry configured to output a first digital signal based on a first number of cycles counted by the counter within one of a clock cycle of a clock signal, wherein the first input signal is digitally converted into the first digital signal, and a second circuitry configured to output a second digital signal based on a second number of cycles counted by the counter in a period from a reference timing of the clock signal to an input timing of a second input signal within the one of the clock cycle of the clock signal, wherein the period is digitally converted into the second digital signal.

Abstract: According to one embodiment, an electronic apparatus includes a light source, a detector, an equalizer and a processing circuitry. The light source is configured to emit a pulse having a first output value and a first frequency response. The detector is configured to detect a reflected wave of the pulse and convert the reflected wave to a first electric signal. The reflected wave of the pulse is received after the pulse is reflected by an object. The equalizer is configured to equalize the first electric signal using tap coefficients to generate a second electric signal. The tap coefficients are based on at least either one of the first output value and the first frequency response. The processing circuitry is configured to estimate a distance to the object based on the second electric signal.

Abstract: An physiological measurement device provides a device body having a base, legs extending from the base and an optical housing disposed at ends of the legs opposite the base. An optical assembly is disposed in the housing. The device body is flexed so as to position the housing over a tissue site. The device body is unflexed so as to attach the housing to the tissue site and position the optical assembly to illuminate the tissue site. The optical assembly is configured to transmit optical radiation into tissue site tissue and receive the optical radiation after attenuation by pulsatile blood flow within the tissue.

Abstract: An physiological measurement device provides a device body having a base, legs extending from the base and an optical housing disposed at ends of the legs opposite the base. An optical assembly is disposed in the housing. The device body is flexed so as to position the housing over a tissue site. The device body is unflexed so as to attach the housing to the tissue site and position the optical assembly to illuminate the tissue site. The optical assembly is configured to transmit optical radiation into tissue site tissue and receive the optical radiation after attenuation by pulsatile blood flow within the tissue.

Abstract: A light detection device includes a light receiving element that photoelectrically converts incident light, and a plurality of transistors that controls a bias voltage applied to the light receiving element and controlling reading of an output signal of the light receiving element, wherein the plurality of transistors comprise at least one or more transistors having a first withstand voltage and one or more transistors having a second withstand voltage higher than the first withstand voltage.

Abstract: An oscillation circuit has a first oscillator having output nodes of n stages, where n is an integer of 3 or more, a second oscillator having output nodes of n stages, and a third oscillator having output nodes of n stages. An output node at an a-th stage of the first oscillator and an output node at an a-th stage of the second oscillator are connected with each other, where a is an integer of 1 or more and n or less and an output node at a b-th stage of the second oscillator and an output node at a b-th stage of the third oscillator are connected with each other, where b is an integer of 1 or more and n or less different from a.

Abstract: An physiological measurement device provides a device body having a base, legs extending from the base and an optical housing disposed at ends of the legs opposite the base. An optical assembly is disposed in the housing. The device body is flexed so as to position the housing over a tissue site. The device body is unflexed so as to attach the housing to the tissue site and position the optical assembly to illuminate the tissue site. The optical assembly is configured to transmit optical radiation into tissue site tissue and receive the optical radiation after attenuation by pulsatile blood flow within the tissue.

Abstract: A photodetection apparatus according to one embodiment has a photodetection element, first reset circuitry configured to select whether to set on-resistance between a first voltage node and a terminal of the photodetection element to a first value, second reset circuitry configured to select whether to set the on-resistance to a second value smaller than the first value, and control circuitry configured to set the on-resistance to the first value by the first reset circuitry after the photodetection element detects light, and set the on-resistance to the second value by the second reset circuitry after the first reset circuitry select to set the on-resistance to the first value.

Abstract: A light-receiving apparatus has M (M is greater than 2) light-receiving elements corresponding to one pixel, and controller circuitry configured to control a bias voltage of the M light-receiving elements in accordance with a condition that the number of light-receiving elements of the M light-receiving elements simultaneously detecting light within a first period is less than N (N is an integer equal to or greater than 2 and less than M).

Abstract: An physiological measurement device provides a device body having a base, legs extending from the base and an optical housing disposed at ends of the legs opposite the base. An optical assembly is disposed in the housing. The device body is flexed so as to position the housing over a tissue site. The device body is unflexed so as to attach the housing to the tissue site and position the optical assembly to illuminate the tissue site. The optical assembly is configured to transmit optical radiation into tissue site tissue and receive the optical radiation after attenuation by pulsatile blood flow within the tissue.